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Hollander, Willard Fisher, Riddle, Oscar (January 1946) Goiter in domestic pigeons. Poultry Science, 25 (1). pp. 20-27.

Hollander, Willard Fisher, Riddle, Oscar (September 1945) On partial melanism associated with parathyroid enlargement in pigeons. The American Naturalist, 79 (784). pp. 456-463.

Lahr, Ernest L., Riddle, Oscar (August 1945) Intersexuality in male embryos of pigeons. The Anatomical Record, 92 (4). pp. 425-431.

Riddle, Oscar, Hollander, Willard Fisher, Schooley, James Plummer (August 1945) A race of hermaphrodite-producing pigeons. The Anatomical Record, 92 (4). pp. 401-423.

McDonald, Margaret R., Riddle, Oscar, Smith, Guinevere C. (July 1945) Action of thyroxin on estrogen-induced changes in blood chemistry and endosteal bone. Endocrinology, 37 (1). pp. 23-28.

McDonald, Margaret R., Riddle, Oscar (July 1945) The effect of reproduction and estrogen administration on the partition of calcium phosphorus and nitrogen in pigeon plasma. The Journal of Biological Chemistry, 159 (2). pp. 445-464.

Riddle, Oscar (February 1945) "Education for all American youth" from the point of view of a biologist. School and Society, 61 (1574). pp. 113-116.

Riddle, Oscar, Rauch, Vita M., Smith, Guinevere C. (January 1945) Action of estrogen on plasma calcium and endosteal bone formation in parathyroidectomized pigeons. Endocrinology, 36 (1). pp. 41-47.

Riddle, Oscar, McDonald, Margaret R. (January 1945) The partition of plasma calcium and inorganic phosphorus in estrogen-treated normal and parathyroidectomized pigeons. Endocrinology, 36 (1). pp. 48-52.

Riddle, Oscar, Dotti, Louis B. (1945) Pituitary and sex hormones which increase plasma calcium in birds and mammals. Proceedings of the American Philosophical Society, 89 (3). pp. 499-516.

Riddle, Oscar, Rauch, Vita M., Smith, Guinevere C. (December 1944) Changes in medullary bone during the reproductive cycle of female pigeons. The Anatomical Record, 90 (4). pp. 295-305.

Seibert, Henri Cleret, Steggerda, Morris (November 1944) Age and hair-form. Change in size and shape of Maya head-hair with age. The Journal of Heredity, 35 (11). pp. 345-347.

Riddle, Oscar, Schooley, James Plummer (October 1944) Tests indicating absence of progesterone in certain avian ovaries. Journal of Washington Academy of Sciences, 34 (10). pp. 341-346.

Riddle, Oscar, Lahr, Ernest L. (October 1944) On broodiness of ring doves following implants in certain steroid hormones. Endocrinology, 35 (4). pp. 255-260.

Riddle, Oscar, Lahr, Ernest L. (October 1944) Relative ability of various steroid hormones to promote growth in oviducts of immature ring-doves. The Yale Journal of Biology and Medicine, 17 (1). pp. 259-268.

Lahr, Ernest L., Riddle, Oscar (October 1944) The action of steroid hormones on the mature dove testis. Endocrinology, 35 (4). pp. 261-266.

Riddle, Oscar (June 1944) Obituary: Charles Benedict Davenport. Science, 99 (2579). pp. 441-442.

Smith, Guinevere C., Riddle, Oscar (May 1944) Effects of fasting on the respiratory metabolism of normal and hypophysectomized young pigeons. The American Journal of Physiology, 141 (3). pp. 303-311.

Schooley, James Plummer, Riddle, Oscar (April 1944) Effect of light upon time of oviposition in ringdoves. Physiological Zoology, 16 (2). pp. 187-193.

Riddle, Oscar, Smith, Guinevere C., Miller, Richard A. (March 1944) The effect of adrenalectomy on heat production in young pigeons. The American Journal of Physiology, 141 (1). pp. 151-157.

Riddle, Oscar, Rauch, Vita M. (1944) Action of estrogen on plasma calcium and endosteal bone formation in parathyroidectomized pigeons (Abstract). Endocrinology, 35. p. 209.

Riddle, Oscar, Hollander, Willard Fisher, McDonald, Margaret R., Lahr, Ernest L., Smith, Guinevere C., Rauch, Vita M. (1944) Endocrine Studies. Annual Report of the Director of the Department of Genetics, Carnegie Institution of Washington Year Book No. 43, 1943-1944, 43. pp. 141-151.

Riddle, Oscar (1944) Life sciences in everyday living. Carnegie Institution of Washington Department of Genetics.

Riddle, Oscar (December 1943) Animal hormones affecting growth and the several effects of single hormones (Abstract). Torreya, 43. pp. 96-97.

Miller, Richard A., Riddle, Oscar (June 1943) Ability of adrenal cortical hormones, prolactin and thyroxin to sustain weight of body and viscera of hypophysectomized pigeons. Endocrinology, 32 (6). pp. 463-474.

Riddle, Oscar, Hollander, Willard Fisher (June 1943) "Scraggly" plumage and ataxia: two inherited characters in the pigeon. The Journal of Heredity, 34 (6). pp. 167-172.

Lahr, Ernest L., Bates, Robert Wesley, Riddle, Oscar (March 1943) Non-specific results obtained with the micro-method for assay of prolactin. Endocrinology, 32 (3). pp. 251-259.

Miller, Richard A., Riddle, Oscar (1943) Effects of prolactin and cortical hormones on body weight and food intake of adrenalectomized pigeons. Proceedings of the Society for Experimental Biology and Medicine, 52. pp. 231-233.

Miller, Richard A., Riddle, Oscar (December 1942) Effects of adrenal cortical hormones alone and in combination with prolactin on body and visceral weights in hypophysectomized pigeons(Abstract). The Anatomical Record, 84 (4, Sup). p. 60.

Riddle, Oscar (December 1942) The preparation of high-school science teachers. The American Biology Teacher, 5 (3). pp. 63-65.

Riddle, Oscar (November 1942) Cyclic changes in blood calcium, phosphorus and fat in relation to egg laying and estrogen production. Endocrinology, 31 (5). pp. 498-506.

Miller, Richard A., Riddle, Oscar (November 1942) The cytology of the adrenal cortex of normal pigeons and in experimentally induced atrophy and hypertrophy. American Journal of Anatomy, 71 (3). pp. 311-335.

Dunham, H. H., Riddle, Oscar (October 1942) Effects of a series of steroids on ovulation and reproduction in pigeons. Physiological Zoology, 15 (4). pp. 383-394.

Riddle, Oscar, Lahr, Ernest L., Bates, Robert Wesley (September 1942) The rôle of hormones in the initiation of maternal behavior in rats. The American Journal of Physiology, 137 (2). pp. 299-317.

Bates, Robert Wesley, Laanes, Theophil, MacDowell, Edwin Carleton, Riddle, Oscar (July 1942) Growth in silver dwarf mice, with and without injections of anterior pituitary extracts. Endocrinology, 31 (1). pp. 53-58.

Riddle, Oscar, Dunham, H. H. (June 1942) Transformation of males to intersexes by estrogen passed from blood of ring doves to their ovarian eggs. Endocrinology, 30 (6). pp. 959-968.

Riddle, Oscar, Opdyke, David F. (March 1942) Gross differences in response of the liver to first and later daily dosage with insulin and prolactin (Abstract). Federation Proceedings, 1 (1). p. 72.

Riddle, Oscar, Dunham, H. H., Schooley, James Plummer (January 1942) Genetic hermaphroditism in a strain of pigeons (Abstract). Genetics, 27 (1). p. 165.

Miller, Ronald Alan (1942) Effects of anterior pituitary preparations and insulin on islet cells of the pigeon pancreas. Endocrinology, 31. p. 535.

Riddle, Oscar (1942) General relationships of hormones to growth and development. Cold Spring Harbor Symposia on Quantitative Biology X: The relation of hormones to development, 10. pp. 7-14.

Bates, Robert Wesley, Riddle, Oscar (November 1941) Annual variation in the response of crop-sacs and viscera of pigeons to prolactin. Endocrinology, 29 (5). pp. 702-709.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (October 1941) A strain difference in responsiveness of chick thyroids to thyrotropin and a step-wise increase during three years in thyroid weights of Carneau pigeons. Endocrinology, 29 (4). pp. 492-497.

Schooley, James Plummer, Riddle, Oscar, Bates, Robert Wesley (July 1941) Replacement therapy in hypophysectomized juvenile pigeons. American Journal of Anatomy, 69 (1). pp. 123-154.

Riddle, Oscar, Opdyke, David F. (May 1941) Hormones capable of increasing liver fat (Abstract). Science, 93 (2419). p. 440.

Lahr, Ernest L., Riddle, Oscar, Bates, Robert Wesley (May 1941) The response of testes of immature pigeons to gonadotrophins. Endocrinology, 28 (5). pp. 681-693.

Riddle, Oscar (April 1941) Symposium: Desirable contributions of science in general education to the democratic way of life. Science Education, 25 (4). pp. 184-186.

Riddle, Oscar (March 1941) Endocrine aspects of the physiology of reproduction. Annual Review of Physiology, 3. pp. 573-616.

Riddle, Oscar, Miller, Richard A. (1941) Cellular response to insulin in suprarenals of pigeons. Proceedings of the Society for Experimental Biology and Medicine, 47. pp. 449-453.

Lahr, Ernest L., Elwell, L. H., Riddle, Oscar (1941) Mitosis observed under colchicine in crop-sac tissue after subcutaneous and intramuscular injection of prolactin. Archives Internationales de Pharmacodynamie et de Thérapie, 65 (3). pp. 278-282.

Riddle, Oscar, Dunham, H. H. (1941) Persistent oviducts and increase of ovarian cortical tissue on left testes of doves at and after hatching as a result of estrogen passed from blood of mother to the egg (Abstract). The Anatomical Record, 81 (4, Sup). p. 29.

Riddle, Oscar (1941) Preliminary impressions and facts from a questionnaire on secondary school biology. The American Biology Teacher, 3 (5). pp. 151-159.

Riddle, Oscar (1941) Science in education in a democracy. The Science Teacher, 8. pp. 1-2.

Riddle, Oscar, Lahr, Ernest L. (December 1940) Pronounced stimulation of testes of doves and pigeons by more recent preparations of pregnancy urine (Abstract). The Anatomical Record, 78 (4, Sup). p. 88.

Riddle, Oscar (October 1940) Better health through expanded science teaching. The Science Teacher, 7. pp. 22-24.

Bates, Robert Wesley, Riddle, Oscar (1940) Annual variation in the crop-sac response to prolactin (Abstract). The Journal of Biological Chemistry, 140 (1). cxliii-iv.

Bates, Robert Wesley, Riddle, Oscar (1940) Effect of volume used for injection in micro-assay of prolactin. Proceedings of the Society for Experimental Biology and Medicine, 44. pp. 505-509.

Riddle, Oscar (1940) Lactogenic and mammogenic hormones. JAMA: the journal of the American Medical Association, 115. pp. 2276-2281.

Riddle, Oscar, Smith, Guinevere C. (1940) Respiratory metabolism of pigeons after adrenalectomy and its increase by prolactin. Proceedings of the Society for Experimental Biology and Medicine, 44. pp. 499-500.

Riddle, Oscar, Johnson, Mychyle W. (December 1939) An undescribed type of partial sex reversal in dove hybrids from a sub-family cross. The Anatomical Record, 75 (4). pp. 509-527.

Riddle, Oscar, Senum, Tellef (December 1939) On the mechanism and hormones concerned in increase of blood fat in birds (Abstract). The Anatomical Record, 75 (4, Sup). p. 58.

Miller, Richard A., Riddle, Oscar (December 1939) Rest, activity and repair in cortical cells of the pigeon adrenal (Abstract). The Anatomical Record, 75 (4, Sup). p. 103.

Satina, Sophia Alexandrovna, Blakeslee, Albert Francis (December 1939) The use of periclinal chimeras in tracing the germ layer origin of tissues in Datura (Abstract). American Journal of Botany, 26 (10). p. 4.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (October 1939) The rôle of sex, estrogenic hormone, fasting and diuresis in the response of crop-sacs of pigeons to prolactin. The American Journal of Physiology, 127 (3). pp. 422-429.

Riddle, Oscar (June 1939) Epic of life. The Scientific Monthly, 48 (6). pp. 530-533.

Bates, Robert Wesley, Riddle, Oscar (April 1939) The question of sex difference in crop-sac response to prolactin (Abstract). Proceedings of the American Society of Biological Chemists, 33. v-vi.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (March 1939) The racial factor in the pigeon crop-sac method of bioassay of prolactin. The American Journal of Physiology, 125 (4). pp. 722-729.

Riddle, Oscar (March 1939) The opportunity and obligation of the National Association of Biology Teachers. The American Biology Teacher, 1 (6). pp. 115-121.

Miller, Ronald Alan, Riddle, Oscar (1939) Stimulation of adrenal cortex of pigeons by ant. pituitary hormones and by their secondary products. Proceedings of the Society for Experimental Biology and Medicine, 41 (2). pp. 518-522.

Johnson, Mychyle W. , Riddle, Oscar (1939) Tests of mammalian gonad-stimulating hormones on gonads of fishes. Proceedings of the Society for Experimental Biology and Medicine, 42. pp. 260-262.

Schooley, James Plummer, Riddle, Oscar, Bates, Robert Wesley (December 1938) Analysis of pituitary support of growth of body and viscera in pigeons (Abstract). The Anatomical Record, 72 (4 Supp). pp. 90-91.

Riddle, Oscar, Schooley, James Plummer (December 1938) Tests indicating absence of progesterone in fowl ovary (Abstract). The Anatomical Record, 72 (4 Supp). p. 59.

Riddle, Oscar (October 1938) Biology teachers begin to pull together. The American Biology Teacher, 1 (1). pp. 1-4.

Lahr, Ernest L., Riddle, Oscar (September 1938) Proliferation of crop-sac epithelium in incubating and in prolactin-injected pigeons studied with colchicine method. The American Journal of Physiology, 123 (3). pp. 614-619.

Riddle, Oscar (August 1938) Prolactin, a product of the anterior pituitary, and the part it plays in vital processes. The Scientific Monthly, 47 (2). pp. 97-113.

Lahr, Ernest L., Riddle, Oscar (June 1938) Proliferation of crop-sac epithelium in incubating and in prolactin-injected pigeons studied with colchicine method (Abstract). The American Journal of Physiology, 123 (1). p. 124.

Riddle, Oscar, Dotti, Louis B. (June 1938) The pituitary and sex hormones capable of increasing serum calcium and some conditions affecting their action (Abstract). The American Journal of Physiology, 123 (1). pp. 177-172.

Riddle, Oscar, Cauthen, George E. (May 1938) Erythrocyte number in young pigeons and its relation to heredity, growth and metabolism. The American Journal of Physiology, 122 (2). pp. 480-485.

Riddle, Oscar (April 1938) Educational darkness and luminous research. Science, 87 (2261). pp. 375-380.

Riddle, Oscar (April 1938) Progress in forming a National Association of Biology Teachers. The Teaching Biologist, 7 (7). pp. 101-103.

Riddle, Oscar (1938) On anterior pituitary hormones (Abstract). The Sechenov Journal of Physiology of the USSR , 21 (5-6). p. 61.

Schooley, James Plummer, Riddle, Oscar (1938) The morphological basis of pituitary function in pigeons. American Journal of Anatomy, 62 (3). pp. 313-349.

Riddle, Oscar, Dotti, Louis B. (December 1937) A blood sugar increasing effect of parathyroid extracts (Abstract). The Anatomical Record, 70 (1). p. 63.

Schooley, James Plummer, Riddle, Oscar, Bates, Robert Wesley (December 1937) A specific action of the anterior pituitary on the intestine (Abstract). The Anatomical Record, 70 (1, and). p. 61.

Riddle, Oscar (November 1937) The hormones of the anterior pituitary. The Ohio Journal of Science, 37 (6). pp. 446-463.

Riddle, Oscar (July 1937) Glands and growth. Carnegie Institution of Washington News Service Bulletin, 4 (16). pp. 143-148.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L., Schooley, James Plummer (July 1937) Aspects of splanchnomegaly associated with the action of prolactin. The American Journal of Physiology, 119 (3). pp. 603-609.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (June 1937) The mechanism of the anti-gonad action of prolactin in adult pigeons. The American Journal of Physiology, 119 (3). pp. 610-614.

Riddle, Oscar, Dotti, Louis B., Smith, Guinevere C. (June 1937) Blood sugar and basal metabolism in pigeons following administration of prolactin and cortin (Abstract). The American Journal of Physiology, 119 (2). pp. 389-390.

Schooley, James Plummer, Riddle, Oscar, Bates, Robert Wesley (May 1937) Effective stimulation of crop-sacs by prolactin in hypophysectomized and in adrenalectomized pigeons. Proceedings of the Society for Experimental Biology and Medicine, 36 (3). pp. 408-411.

Riddle, Oscar (May 1937) A national association of biology teachers. The Teaching Biologist , 6 (8). 3 p..

Riddle, Oscar (April 1937) The relative claims of natural science and of social studies to a core place in the secondary school curriculum. A.For natural science. Science Education, 21 (2). pp. 65-71.

Riddle, Oscar, Dotti, Louis B. (December 1936) Blood calcium in relation to anterior pituitary and sex hormones. Science, 84 (2190). pp. 557-559.

Bates, Robert Wesley, Riddle, Oscar (June 1936) Effect of route of administration on the bioassay of prolactin. Proceedings of the Society for Experimental Biology and Medicine, 34 (9). pp. 847-849.

Riddle, Oscar (June 1936) Life-science and man. The Scientific Monthly, 42 (6). pp. 537-540.

Riddle, Oscar, Bates, Robert Wesley, Lahr, Ernest L., Moran, Clarence S. (June 1936) On the identity of the hormone causing ovulation in the rabbit (Abstract). The American Journal of Physiology, 116 (1). pp. 128-129.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (June 1936) Racial variation in the crop-gland response of doves and pigeons to prolactin (Abstract). The American Journal of Physiology, 116 (1). pp. 7-8.

Lahr, Ernest L., Riddle, Oscar, Bates, Robert Wesley (May 1936) Histological changes induced in the testes of immature doves and pigeons by gonadotropic hormone (Abstract). The American Journal of Physiology , 116 (1). pp. 94-95.

Schooley, James Plummer, Riddle, Oscar (January 1936) Cytological evidences of cyclic changes in the anterior pituitary of doves and pigeons (Abstract). The Anatomical Record, 64 (2). p. 42.

Riddle, Oscar (January 1936) The confusion of tongues (continued). Science, 83 (2143). pp. 69-74.

Riddle, Oscar (January 1936) The confusion of tongues. Science, 83 (2142). pp. 41-45.

Riddle, Oscar, Smith, Guinevere C., Bates, Robert Wesley, Moran, Clarence S., Lahr, Ernest L. (January 1936) Action of anterior pituitary hormones on basal metabolism of normal and hypophysectomized pigeons and on a paradoxical influence of temperature. Endocrinology, 20 (1). pp. 1-16.

Schooley, James Plummer, Riddle, Oscar (1936) Reciprocal weight changes in liver and testis of pigeons during reproduction (Abstract). The Anatomical Record, 67 (1). p. 51.

Riddle, Oscar, Dotti, Louis B. (1936) Sex hormones and serum calcium (Abstract). The Anatomical Record, 67 (1). p. 51.

Lahr, Ernest L., Riddle, Oscar (1936) Temporary suppression of estrous cycles in the rat by prolactin. Proceedings of the Society for Experimental Biology and Medicine, 34 (9). pp. 880-883.

Bates, Robert Wesley, Riddle, Oscar (November 1935) The preparation of prolactin. The Journal of Pharmacology and Experimental Therapeutics , 55 (3). pp. 365-371.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (October 1935) An assay of three hormones present in the anterior pituitaries of seven types of cattle classified for age, sex, and stage of reproduction. The American Journal of Physiology, 113 (2). pp. 259-264.

Riddle, Oscar, Smith, Guinevere C. (October 1935) The effect of temperature on the calorigenic action of dinitrophenol in normal and thyroidectomized pigeons. The Journal of Pharmacology and Experimental Therapeutics, 55 (2). pp. 173-178.

Riddle, Oscar (September 1935) Aspects and implications of the hormonal control of the maternal instinct. Proceedings of the American Philosophical Society, 75 (6). pp. 521-525.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (September 1935) Concurrent assay of three hormones from anterior pituitaries of seven age and sex groups of cattle (Abstract). The American Journal of Physiology, 113 (1). pp. 8-9.

Riddle, Oscar, Lahr, Ernest L., Bates, Robert Wesley (August 1935) Effectiveness and specificity of prolactin in the induction of the maternal instinct in virgin rats (Abstract). The American Journal of Physiology, 113 (1). p. 109.

Lahr, Ernest L., Riddle, Oscar, Bates, Robert Wesley (August 1935) Effects of prolactin and follicle-stimulating hormone on the adult dove testis (Abstract). The American Journal of Physiology, 113 (1). p. 84.

Riddle, Oscar, Lahr, Ernest L., Bates, Robert Wesley (August 1935) Prolactin induced activities which express maternal behavior in virgin rats (Abstract). The American Journal of Physiology, 113 (1). p. 110.

Riddle, Oscar, Bates, Robert Wesley, Lahr, Ernest L. (February 1935) Prolactin induces broodiness in fowl. The American Journal of Physiology, 111 (2). pp. 352-360.

Bates, Robert Wesley, Lahr, Ernest L., Riddle, Oscar (February 1935) The gross action of prolactin and follicle-stimulating hormone on the mature ovary and sex accessories of fowl. The American Journal of Physiology, 111 (2). pp. 361-368.

Riddle, Oscar, Lahr, Ernest L., Bates, Robert Wesley (February 1935) Maternal behavior induced in virgin rats by prolactin. Proceedings of the Society for Experimental Biology and Medicine, 32 (5). pp. 730-734.

Riddle, Oscar (January 1935) Contemplating the hormones. Endocrinology, 19 (1). pp. 1-13.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (January 1935) The racial factor in the response to a hormone, prolactin (Abstract). The American Naturalist, 69 (720). pp. 55-56.

Riddle, Oscar, Schooley, James Plummer (1935) Absence of follicle-stimulating hormone in pituitaries of young pigeons. Proceedings of the Society for Experimental Biology and Medicine, 32 (9). pp. 1610-1614.

Riddle, Oscar, Smith, Guinevere C., Moran, Clarence S. (1935) Effects of complete and incomplete hypophysectomy on the basal metabolism of pigeons. Proceedings of the Society for Experimental Biology and Medicine, 32 (9). pp. 1614-1616.

Riddle, Oscar, Dotti, Louis B. (December 1934) Action of parathyroid hormone in normal and hypophysectomized pigeons. Proceedings of the Society for Experimental Biology and Medicine, 32 (3). pp. 507-509.

Riddle, Oscar, Lahr, Ernest L., Bates, Robert Wesley, Moran, Clarence S. (December 1934) Response of adult rat testes sex accessories and adrenals to injections of prolactin. Proceedings of the Society for Experimental Biology and Medicine, 32 (3). pp. 509-512.

Riddle, Oscar, Braucher, Pela Fay (June 1934) Hemoglobin and erythrocyte differences according to sex and season in doves and pigeons. The American Journal of Physiology, 108 (3). pp. 554-566.

Riddle, Oscar, Smith, Guinevere C., Benedict, Francis G. (February 1934) Seasonal and temperature factors and their determination in pigeons of percentage metabolism change per degree of temperature change. The American Journal of Physiology, 107 (2). pp. 333-342.

Riddle, Oscar, Braucher, Pela Fay (February 1934) Studies on the physiology of reproduction in birds: XXXIII. Body size changes in doves and pigeons incident to stages of the reproductive cycle. The American Journal of Physiology, 107 (2). pp. 343-347.

Kurzbok, Raphael, Bates, Robert Wesley, Riddle, Oscar, Miller, Edgar G. (January 1934) The clinical use of prolactin. Endocrinology, 18 (1). p. 18.

Bates, Robert Wesley, Riddle, Oscar, Lahr, Ernest L. (1934) On the protein nature of prolactin and of follicle-stimulating hormones. Proceedings of the Society for Experimental Biology and Medicine, 31 (8). pp. 1223-1224.

Riddle, Oscar, Bates, Robert Wesley, Lahr, Ernest L. (1934) Prolactin induces broodiness in fowl (Abstract). The Anatomical Record, 60 (4 and ). p. 49.

Riddle, Oscar, Bates, Robert Wesley (November 1933) Concerning anterior pituitary hormones. Endocrinology, 17 (6). pp. 689-698.

Riddle, Oscar, Nussmann, Theodora C. (September 1933) A sex difference in pituitary size and intestinal length in doves and pigeons. The Anatomical Record, 57 (2). pp. 197-204.

Riddle, Oscar, Smith, Guinevere C., Benedict, Francis G. (August 1933) Studies on the physiology of reproduction in birds: XXXII. Basal metabolism and the temperature factor in brooding ring doves. The American Journal of Physiology, 105 (2). pp. 428-433.

Riddle, Oscar, Bates, Robert Wesley, Dykshorn, Simon W. (June 1933) The preparation, identification and assay of prolactin- a hormone of the anterior pituitary. The American Journal of Physiology, 105 (1). pp. 191-216.

Riddle, Oscar (May 1933) Book Review: Endocrinology and Eugenics. The Journal of Heredity, 24 (5). p. 179.

Riddle, Oscar (1933) Differentiating some functions of the anterior pituitary hormones. Annals of Internal Medicine, 7 (1). pp. 23-32.

Riddle, Oscar, Bates, Robert Wesley, Dykshorn, Simon W. (1933) Thyroid hypertrophy as a response to the gonad-stimulating hormone of the pituitary. Proceedings of the Society for Experimental Biology and Medicine, 30 (6). pp. 794-797.

Riddle, Oscar, Dykshorn, Simon W. (July 1932) Secretion of crop-milk in the castrate male pigeon. Proceedings of the Society for Experimental Biology and Medicine, 29 (9). pp. 1213-1215.

Riddle, Oscar, Nussmann, Theodora C., Benedict, Francis G. (1932) Metabolism during growth in a common pigeon. The American Journal of Physiology, 101 (2). pp. 251-259.

Riddle, Oscar, Bates, Robert Wesley, Dykshorn, Simon W. (1932) Prolactin, a new and third hormone of the anterior pituitary (Abstract). The Anatomical Record, 54. p. 25.

Riddle, Oscar, Charles, Donald R., Cauthen, George E. (1932) Relative growth in large and small races of pigeons. Proceedings of the Society for Experimental Biology and Medicine, 29 (9). pp. 1216-1220.

Riddle, Oscar, Smith, Guinevere C., Benedict, Francis G. (1932) Seasonal, endocrine and temperature factors which determine percentage metabolism change per degree of temperature change (Abstract). The American Journal of Physiology, 101 (1). p. 88.

Riddle, Oscar, Smith, Guinevere C., Benedict, Francis G. (1932) The basal metabolism of the mourning dove and some of its hybrids. The American Journal of Physiology, 101 (2). pp. 260-267.

Riddle, Oscar, Bates, Robert Wesley, Dykshorn, Simon W. (1932) A new hormone of the interior pituitary. Proceedings of the Society for Experimental Biology and Medicine, 29 (9). pp. 1211-1212.

Riddle, Oscar (July 1931) Studies on the physiology of reproduction in birds. XXIX: Season of origin as a determiner of age at which birds become sexually mature. The American Journal of Physiology, 97 (4). pp. 581-587.

Riddle, Oscar, Smith, Guinevere C., Benedict, Francis G. (1931) Concerning seasonal changes in the basal metabolism of pigeons (Abstract). The Anatomical Record, 51 (1s). p. 32.

Riddle, Oscar (1931) Factors involved in the development of sex and secondary sexual characteristics. Physiological Reviews, 11 (1). pp. 63-106.

Riddle, Oscar, Braucher, Pela Fay (1931) Hemoglobin and erythrocytes of doves and pigeons in their relation to sex and season (Abstract). The Anatomical Record, 51 (1s). p. 118.

Riddle, Oscar (1931) Man's control of his own development. The Scientific Monthly, 33 (6). pp. 555-558.

Riddle, Oscar (1931) Studies on pituitary functions. Endocrinology, 15 (4). pp. 307-314.

Riddle, Oscar, Braucher, Pela Fay (1931) Studies on the physiology of reproduction in birds. XXX: Control of the special secretion of the crop-gland in pigeons by an anterior pituitary hormone. The American Journal of Physiology, 97 (4). pp. 617-625.

Riddle, Oscar, Polhemus, Irene (1931) Studies on the physiology of reproduction in birds. XXXI: Effects of anterior pituitary hormones on gonads and other organ weights in the pigeon. The American Journal of Physiology, 98 (1). pp. 121-130.

Riddle, Oscar, Burns, Frances H. (1931) A conditioned emetic reflex in the pigeon. Proceedings of the Society for Experimental Biology and Medicine, 28 (9). pp. 979-981.

Riddle, Oscar, Christman, Guinevere, Benedict, Francis G. (October 1930) Differential response of male and female ring doves to metabolism measurement at higher and lower temperatures. The American Journal of Physiology, 95 (1). pp. 111-120.

Riddle, Oscar (September 1930) Studies on the physiology of reproduction in birds. XXVII: The age distribution of mortality in bird embryos and its probable significance. The American Journal of Physiology, 94 (3). pp. 535-547.

Riddle, Oscar (1930) Complete atrophy of kidney in pigeons following section of the ureter. Proceedings of the Society for Experimental Biology and Medicine, 27 (9). pp. 1022-1024.

Riddle, Oscar (October 1929) Thyroid size in the sexes (Abstract). The American Journal of Physiology, 90 (2). p. 495.

Riddle, Oscar (September 1929) The inheritance of thyroid size and the establishment of thyroid races in ring doves. The American Naturalist, 63 (688). pp. 385-409.

Riddle, Oscar (July 1929) Endocrine regulation of reproduction. Endocrinology, 13 (4). pp. 311-319.

Benedict, Francis G., Riddle, Oscar (July 1929) The measurement of the basal heat production of pigeons. I. Instrumental technique. II. Physiological technique. The Journal of Nutrition , 1 (6). pp. 475-536.

Riddle, Oscar (March 1929) Some interrelations of sexuality, reproduction and internal secretion. JAMA: the journal of the American Medical Association, 92 (12). pp. 943-950.

Satina, Sophia Alexandrovna, Blakeslee, Albert Francis (1929) Criteria of male and female in bread moulds (Mucors). Proceedings of the National Academy of Sciences, 15 (9). pp. 735-740.

Riddle, Oscar (1929) Das thyreoideagewicht und das geschlecht. Endokrinologie, 5. pp. 241-256.

Riddle, Oscar (1929) The special contribution of developmental mechanics to the thought and purpose of the man of tomorrow. Proceedings of the American Philosophical Society, 68 (2). pp. 107-117.

Riddle, Oscar (December 1928) Can we control sex? Science and Invention Magazine.

Riddle, Oscar, Tange, Masaharu (November 1928) Studies on the physiology of reproduction in birds. XXV: The action of the ovarian and placental hormone in the pigeon. The American Journal of Physiology, 87 (1). pp. 97-109.

Riddle, Oscar, Flemion, Florence (November 1928) Studies on the physiology of reproduction in birds. XXVI: The rôle of the anterior pituitary in hastening sexual maturity in ring doves. The American Journal of Physiology, 87 (1). pp. 110-123.

Riddle, Oscar (September 1928) Studies on the physiology of reproduction in birds. XXIII: Growth of the gonads and Bursa Fabricii in doves and pigeons, with data for body growth and age at maturity. The American Journal of Physiology, 86 (2). pp. 248-265.

Riddle, Oscar (March 1928) Internal secretions in evolution and reproduction. The Scientific Monthly, 26 (3). pp. 202-216.

Riddle, Oscar, Flemion, Florence (March 1928) A sex difference in intestinal length and its relation to pituitary size. Endocrinology, 12 (2). pp. 203-208.

Riddle, Oscar, Reinhart, Warren H. (1928) Physiological activity and the Manoilov reaction. The American Journal of Physiology, 87 (2). pp. 517-525.

Riddle, Oscar (1928) Sex and seasonal differences in weight of liver and spleen. Proceedings of the Society for Experimental Biology and Medicine, 25 (6). pp. 474-476.

Riddle, Oscar, Tange, Masaharu (1928) Studies on the physiology of reproduction in birds. XXIV: On the extirpation of the bursa Fabricii in young doves. The American Journal of Physiology, 86 (2). pp. 266-273.

Riddle, Oscar (November 1927) On endocrines and organisms. The American Naturalist, 61 (677). pp. 481-502.

Riddle, Oscar (November 1927) The cyclical growth of the vesicula seminalis in birds is hormone controlled. The Anatomical Record, 37 (1).

Riddle, Oscar (August 1927) Discussion: The quantitative theory of sex. Science, 66 (1703). pp. 169-170.

Riddle, Oscar, Burns, Frances H. (August 1927) Studies on the physiology of reproduction in birds. XXII: Blood fat and phosphorus in the sexes and their variations in the reproductive cycle. The American Journal of Physiology, 81 (3). pp. 711-724.

Riddle, Oscar, Reinhart, Warren H. (July 1927) The influence of activity on the Manoilov reaction in blood and tissue extracts (Abstract). The American Journal of Physiology, 81 (2). pp. 506-507.

Riddle, Oscar (May 1927) Studies on thyroids. Endocrinology, 11 (3). pp. 161-172.

Riddle, Oscar (March 1927) Some aspects of sexual difference in prenatal growth and death. The American Naturalist, 61 (673). pp. 97-112.

Riddle, Oscar (February 1927) Discussion and Correspondence: "Quantitative theory of sex". Science, 65 (1675). pp. 139-141.

Riddle, Oscar, Reinhart, Warren H. (1927) Is the Manoilov reaction a better test for metabolic level than for sex? Proceedings of the Society for Experimental Biology and Medicine, 24 (4). pp. 359-362.

Riddle, Oscar (1927) Metabolic changes in the body of female pigeons at ovulation. Proceedings of the American Philosophical Society, 66. pp. 497-509.

Riddle, Oscar, Reinhart, Warren H. (December 1926) The Manoilov sex test applied to the blood of pigeons. The Anatomical Record, 34 (3). p. 110.

Riddle, Oscar, Reinhart, Warren H. (May 1926) Studies on the physiology of reproduction in birds: XXI. Blood calcium changes in the reproductive cycle. The American Journal of Physiology, 76 (3). pp. 660-676.

Riddle, Oscar (1926) Establishment of races of pigeons with characteristically large and with characteristically small thyroids. The Anatomical Record, 34 (3). p. 180.

Riddle, Oscar, Tange, Masaharu (1926) Some limitations of the action of the so-called follicular hormone in birds. Proceedings of the Society for Experimental Biology and Medicine, 23. pp. 648-652.

Riddle, Oscar (August 1925) On the sexuality of the right ovary of birds. Anatomical Record, The, 30 (5). pp. 365-383.

Riddle, Oscar (June 1925) Studies on the physiology of reproduction in birds: XX. Reciprocal size changes of gonads and thyroids in relation to season and ovulation rate in pigeons. American Journal of Physiology, The, 73 (1). pp. 5-16.

Riddle, Oscar (May 1925) Some concurrent changes involving the newer aspect of the sex problem (Abstract). Science, 61 (1585). pp. 521-533.

Riddle, Oscar, Fisher, Walter S. (May 1925) Seasonal variation of thyroid size in pigeons. American Journal of Physiology, The, 72 (3). pp. 464-487.

Riddle, Oscar (January 1925) Birds without gonads: their origin, behaviour, and bearing on the theory of the internal secretion of the testis. The British Journal of Experimental Biology, 2. pp. 211-246.

Riddle, Oscar (January 1925) Complete sex-transformation in adult animals. The New Republic, 41. pp. 225-228.

Riddle, Oscar (January 1925) The comment on sex in pigeons contained in Gerould's paper on butterflies. American Naturalist, The, 59 (660). pp. 79-87.

Riddle, Oscar, Frey, Paul (January 1925) The growth and age involution of the thymus in male and female pigeons. American Journal of Physiology, The, 71 (2). pp. 413-429.

Riddle, Oscar, Honeywell, Hannah Elizabeth (1925) Blood calcium in relation to sex in pigeons. Proceedings of the Society for Experimental Biology and Medicine, 22 (4). pp. 222-225.

Riddle, Oscar (1925) Sex in a fraternity of pigeons obtained from an inter-family cross. Anatomical Record, The, 31 (4). p. 349.

Riddle, Oscar (October 1924) On the necessary gaseous environment of the bird embryo. Ecology, 5 (4). p. 348.

Riddle, Oscar (September 1924) Any hereditary character and the kinds of things we need to know about it. The American Naturalist, 58 (658). pp. 410-425.

Riddle, Oscar (May 1924) Studies on the physiology of reproduction in birds: XIX. A hitherto unknown function of the thymus. The American Journal of Physiology, 68 (3). pp. 557-580.

Riddle, Oscar, Honeywell, Hannah Elizabeth, Fisher, Walter S. (May 1924) Suprarenal enlargement under heavy dosage with insulin. The American Journal of Physiology, 68 (3). pp. 461-476.

Bartelmez, George W., Riddle, Oscar (March 1924) On parthenogenetic cleavage and on the rôle of water absorption by the ovum in the formation of the subgerminal cavity in the pigeon's egg. American Journal of Anatomy, 33 (1). pp. 57-66.

Riddle, Oscar (March 1924) A case of complete sex-reversal in the adult pigeon. The American Naturalist, 58 (655). pp. 167-181.

Riddle, Oscar, Honeywell, Hannah Elizabeth, Spannuth, John R. (February 1924) A relationship of blood sugar to thyroid and suprarenal size in a fraternity of pigeons. The American Journal of Physiology, 67 (3). pp. 539-546.

Riddle, Oscar, Honeywell, Hannah Elizabeth (January 1924) Studies on the physiology of reproduction in birds: XVI. The normal blood sugar of pigeons and its relation to age, sex, species, and certain diseases. The American Journal of Physiology, 67 (2). pp. 317-332.

Riddle, Oscar, Honeywell, Hannah Elizabeth (January 1924) Studies on the physiology of reproduction in birds: XVII. Blood-sugar and ovulation under inactivity or close confinement. The American Journal of Physiology, 67 (2). pp. 333-336.

Riddle, Oscar, Honeywell, Hannah Elizabeth (January 1924) Studies on the physiology of reproduction in birds: XVIII. Effects of the onset of cold weather on blood sugar and ovulation rate in pigeons. The American Journal of Physiology, 67 (2). pp. 337-345.

Riddle, Oscar (1924) Sex in the right and left sides of the bird's body. Proceedings of the American Philosophical Society, 63 (1). pp. 152-161.

Riddle, Oscar (October 1923) Studies on the physiology of reproduction in birds: XIII. Asphyxial death of embryos in eggs abnormally retained in the oviduct. The American Journal of Physiology, 66 (2). pp. 309-321.

Riddle, Oscar (October 1923) Studies on the physiology of reproduction in birds: XIV. Suprarenal hypertrophy coincident with ovulation. The American Journal of Physiology, 66 (2). pp. 322-339.

Riddle, Oscar (September 1923) On the cause of twinning and abnormal development in birds. American Journal of Anatomy, 32 (2). pp. 199-252.

Riddle, Oscar, Honeywell, Hannah Elizabeth (September 1923) The behavior of blood-sugar values in heredity. The American Naturalist, 57 (652). pp. 412-434.

Riddle, Oscar, Minoura, Tadachika (1923) Effects of repeated transplantation of whole suprarenals into young doves. Proceedings of the Society for Experimental Biology and Medicine, 20 (8). pp. 456-461.

Riddle, Oscar (1923) Resistance of pigeons to the lethal action of iletin (insulin) with observed effects on reproduction. Proceedings of the Society for Experimental Biology and Medicine, 20 (5). pp. 244-247.

Harris, Reginald Gordon (1923) Sur la culture des larves de Cécidomyies Paedogénétiques (Miastor) en milieu artificiel. Comptes rendus des séances de la Société de Biologie, 88. p. 256.

Honeywell, Hannah Elizabeth, Riddle, Oscar (1923) The action of iletin (insulin) on the blood-sugar of pigeons. Proceedings of the Society for Experimental Biology and Medicine, 20 (5). pp. 248-252.

Honeywell, Hannah Elizabeth, Riddle, Oscar (1922) Increased blood sugar coincident with ovulation in pigeons. Proceedings of the Society for Experimental Biology and Medicine, 19 (8). pp. 377-380.

Riddle, Oscar (1922) An undescribed relation of the suprarenals to ovulation. Proceedings of the Society for Experimental Biology and Medicine, 19 (6). pp. 280-282.

Riddle, Oscar (December 1921) A simple method of obtaining premature eggs from birds. Science, 54 (1409). pp. 664-666.

Riddle, Oscar, Behre, Ellinor H. (September 1921) Studies on the physiology of reproduction in birds: IX. On the relation of stale sperm to fertility and sex in ring-doves. American Journal of Physiology, The, 57 (2). pp. 228-249.

Riddle, Oscar (September 1921) Studies on the physiology of reproduction in birds: X. Inadequate egg shells and the early death of embryos in the egg. American Journal of Physiology, The, 57 (2). pp. 250-263.

Riddle, Oscar, Hanke, Martin C. E. (September 1921) Studies on the physiology of reproduction in birds: XI. Effects of feeding soluble calcium salts upon reproductive secretions and upon the total inorganic constituents of the egg shell. American Journal of Physiology, The, 57 (2). pp. 264-274.

Riddle, Oscar, King, Cecil V. (September 1921) Studies on the physiology of reproduction in birds: XII. The relation of nerve stimuli to oviducal secretions as indicated by effects of atropine and other alkaloids. American Journal of Physiology, The, 57 (2). pp. 275-290.

Riddle, Oscar (1921) General effects of increased and decreased pressures of oxygen on dove embryos. Proceedings of the Society for Experimental Biology and Medicine, 18. pp. 102-105.

Riddle, Oscar (1921) Identical twins in pigeons arise from ova of markedly aberrant size. Proceedings of the Society for Experimental Biology and Medicine, 19 (1). pp. 12-14.

Riddle, Oscar (April 1920) Calorimetric determinations of the energy in yolk-protein and yolk-fat of doves and pigeons. Science, 51 (1318). p. 350.

Riddle, Oscar (1920) Differential survival of male and female dove embryos in increased and decreased pressures of oxygen: a test of the metabolic theory of sex. Proceedings of the Society for Experimental Biology and Medicine, 18 (3). pp. 88-91.

Koch, Mathilda L., Riddle, Oscar (December 1919) Further studies on the chemical composition of the brain of normal and ataxic pigeons. The Journal of Comparative Neurology, 31 (2). pp. 83-110.

Behre, Ellinor H., Riddle, Oscar (December 1919) The effect of quinine on the nitrogen content of the egg albumen of ring doves. The American Journal of Physiology, 50 (3). pp. 364-376.

Riddle, Oscar, La Mer, Victor K. (September 1918) Post-mortem melanin pigment formation in pigmentless retinas and choroids of white ring-doves. The American Journal of Physiology, 46 (1). pp. 103-123.

Riddle, Oscar, Anderson, Carl E. (September 1918) Studies on the physiology of reproduction in birds: VIII. The effects of quinine on the production of egg yolk and egg albumen. The American Journal of Physiology, 46 (1). pp. 92-102.

Koch, Mathilda L., Riddle, Oscar (September 1918) The chemical composition of the brain of normal and ataxic (?) pigeons. The American Journal of Physiology, 46 (1). pp. 124-136.

Riddle, Oscar (July 1918) A demonstration of the origin of two pairs of female identical twins from two ova of high storage metabolism. Journal of Experimental Zoology, 26 (2). pp. 227-254.

Riddle, Oscar (May 1918) Further observations on the relative size and form of the right and left testes of pigeons in health and disease and as influenced by hybridity. The Anatomical Record, 14 (5). pp. 283-334.

Riddle, Oscar, Harris, James Arthur (April 1918) Note on the relation of blood fat to sex, and on the correlation between blood fat and egg production in the domestic fowl. The Journal of Biological Chemistry, 34 (1). pp. 161-170.

Riddle, Oscar (January 1918) A case of hereditary ataxia (?) in pigeons. Proceedings of the Society for Experimental Biology and Medicine, 15 (4). pp. 56-58.

Riddle, Oscar (July 1917) The theory of sex as stated in terms of results of studies on pigeons. Science, 46 (1175). pp. 19-24.

Riddle, Oscar (June 1917) The control of the sex ratio. Journal of the Washington Academy of Sciences, 7 (11). pp. 319-356.

Riddle, Oscar, Lawrence, John Vincent (December 1916) Studies on the physiology of reproduction in birds: VII. Variations in the chemical composition of reproductive tissues in relation to variations in functional activity. The American Journal of Physiology, 42 (1). pp. 151-162.

Riddle, Oscar (October 1916) Size and length relations of the right and left testes of pigeons in health and disease. The Anatomical Record, 11 (3). pp. 87-102.

Riddle, Oscar (September 1916) Studies on the physiology of reproduction in birds: I. The occurrence and measurement of a sudden change in the rate of growth of avian ova. The American Journal of Physiology, 41 (3). pp. 387-396.

Spohn, Adelaide A., Riddle, Oscar (September 1916) Studies on the physiology of reproduction in birds: II. On the chemical composition of the white and yellow egg yolk of the fowl and pigeon. The American Journal of Physiology, 41 (3). pp. 397-408.

Riddle, Oscar (September 1916) Studies on the physiology of reproduction in birds: III. On the metabolism of the egg yolk of the fowl during incubation. The American Journal of Physiology, 41 (3). pp. 409-418.

Riddle, Oscar, Spohn, Adelaide A. (September 1916) Studies on the physiology of reproduction in birds: IV. When a gland functions for the first time, is its secretion the equivalent of subsequent secretions? The American Journal of Physiology, 41 (3). pp. 419-424.

Riddle, Oscar, Basset, Gardiner C. (September 1916) Studies on the physiology of reproduction in birds: V. The effect of alcohol on the size of the yolk of pigeon's egg. The American Journal of Physiology, 41 (3). pp. 425-429.

Lawrence, John Vincent, Riddle, Oscar (September 1916) Studies on the physiology of reproduction in birds: VI. Sexual differences in the fat and phosphorus content of the blood of fowls. The American Journal of Physiology, 41 (3). pp. 430-437.

Riddle, Oscar (July 1916) Sex control and known correlations in pigeons. The American Naturalist, 50 (595). pp. 385-410.

Riddle, Oscar (December 1915) A note on social aspects of new data on the biology of sex. Journal of the National Institute of Social Sciences, 1. pp. 39-42.

Riddle, Oscar (October 1914) The determination of sex and its experimental control. Bulletin of the American Academy of Medicine, 15 (5). pp. 265-285.

Riddle, Oscar (1914) A quantitative basis of sex as indicated by the sex behavior of doves from a sex-controlled series (Abstract). Science, 39 (1003). p. 440.

Riddle, Oscar (December 1912) Book Review: Marshall's "The physiology of reproduction". Science, 36 (937). pp. 827-828.

Riddle, Oscar (May 1912) A note on Professor Whitman's unpublished work. The University of Chicago Magazine, 4 (6). pp. 208-211.

Riddle, Oscar (March 1912) Preliminary chemical studies on male and female producing eggs of pigeons: a study of the eggs of forms in which the dominance of male and female sex and of white and dark color was experimentally determined by Professor C. O. Whitman. Science, 35 (899). pp. 462-463.

Riddle, Oscar (January 1912) A case of yolk formation not connected with the production of ova. The Biological Bulletin, 22 (2). pp. 107-111.

Riddle, Oscar (December 1911) The permeability of the ovarian egg-membranes of the fowl. Science, 34 (886). pp. 887-889.

Riddle, Oscar (November 1911) On the cause of autotomy in tubularia. The Biological Bulletin, 21 (6). pp. 389-395.

Riddle, Oscar (August 1909) The rate of digestion in cold-blooded vertebrates. The influence of season and temperature. The American Journal of Physiology, 24 (5). pp. 447-458.

Riddle, Oscar (June 1908) The rate of growth of the egg-yolk in the chick, and the significance of white and yellow yolk in the ova of vertebrates. Science, 27 (703). p. 945.

Riddle, Oscar (February 1907) A study of fundamental bars in feathers. The Biological Bulletin, 12 (3). pp. 165-174.

Book Section

Riddle, Oscar (1942) Amount and nature of biology teachers in secondary schools. In: The teaching of biology in secondary schools of the United States. Committee on the Teaching of Biology of the Union of American Biological Societies, pp. 54-76.

Riddle, Oscar (1941) Barriers to effective teaching of secondary school biology. In: Making Science instruction more worthwhile. Dept. of science instruction of the National education association of the United States of America , Washington, D. C., pp. 20-27.

Riddle, Oscar (1941) The promise of endocrinology. In: The march of medicine. Lectures to the Laity of the New York Academy of Medicine . Columbia University Press, New York, pp. 90-115.

Riddle, Oscar, Bates, Robert Wesley, Schooley, James Plummer, Senum, Tellef, Lahr, Ernest L., Miller, Richard A., Smith, George A. (1939) Endocrine Studies. In: Annual Report of the Director of the Department of Genetics, Carnegie Institution of Washington, Year Book No. 38, 1938-1930. Carnegie Institution of Washington Year Book, 38 . Carnegie Institution of Washington, Washington, D. C., pp. 195-202.

Riddle, Oscar, Bates, Robert Wesley (1939) The preparation, assay and actions of lactogenic hormone. In: Sex and internal secretions. The Williams & Wilkens Company, Baltimore, pp. 1088-1117.

Riddle, Oscar (1938) The changing organism. In: Cooperation in research/ by staff members and research associates, the Carnegie Institution of Washington. Carnegie Institution of Washington Publication No. 501, 501 . Carnegie Institution of Washington, Washington, D.C., pp. 259-273.

Riddle, Oscar, Bates, Robert Wesley, Schooley, James Plummer, Smith, Guinevere C., Lahr, Ernest L., Johnson, Beatrice W. (1937) Endocrine Studies. In: Annual Report of the Director of the Department of Genetics, Carnegie Institution of Washington, Year Book No. 36, 1936-37. Carnegie Institution of Washington, Washington, D. C., pp. 55-62.

Riddle, Oscar, Bates, Robert Wesley (1936) Chemical basis of sex. In: Encyclopaedia sexualis : a comprehensive encyclopaedia-dictionary of the sexual sciences. Dingwall-Rock.

Riddle, Oscar, Bates, Robert Wesley, Schooley, James Plummer, Smith, Guinevere C., Lahr, Ernest L., Johnson, M. W. (1936) Endocrine Studies. In: Annual Report of the Director of the Department of Genetics, Carnegie Institution of Washington, Year Book No. 35, 1935-36. Carnegie Institution of Washington, Washington, D.C., pp. 49-56.

Riddle, Oscar, Bates, Robert Wesley, Moran, Clarence S., Smith, Guinevere C., Lahr, Ernest L., Schooley, James Plummer (1935) Endocrine Studies. In: Annual Report of Department of Genetics, Carnegie Institution of Washington, Year Book No. 34, 1934-35. Carnegie Institution of Washington, Washington, D.C., pp. 48-55.

Riddle, Oscar (1935) The lactogenic factor of the pituitary. In: Glandular physiology and therapy. American Medical Association, Chicago, pp. 81-84.

Riddle, Oscar (1932) Metabolism and sex. In: Sex and Internal Secretions. The Williams & Wilkens Company, Baltimore, pp. 246-280.

Riddle, Oscar (1932) Sex and intersex in pigeons. In: Proceedings of the Sixth International Congress of Genetics, Ithaca, New York. Brooklyn Botanic Garden, Menasha, Wisconsin, pp. 165-166.

Riddle, Oscar (1932) The establishment of "endocrine" races in doves and pigeons (Abstract) (Demonstration). In: Proceedings of the Sixth International Congress of Genetics, Ithaca, New York. Brooklyn Botanic Garden, Menasha, Wisconsin, p. 256.

Riddle, Oscar (1931) New data on the relation of metabolism to sex. In: Proceedings of the Second International Congress for Sex Research, London, 1930. Oliver and Boyd, Edinburgh, Great Britain.

Monograph

Riddle, Oscar, Hollander, Willard Fisher, Miller, Richard A., Lahr, Ernest L., Smith, Guinevere C., Marvin, Horace N. (1942) Endocrine Studies. Project Report. Carnegie Institution of Washington, Washington, D. C..

Conference or Workshop Item

Riddle, Oscar (1943) Should euthanasia be made lawful? I. The viewpoint of a biologist. In: Society for Medical Jurisprudence.

Riddle, Oscar (1937) On carbohydrate metabolism in pigeons. In: Cold Spring Harbor Symposia on Quantitative Biology V: Internal Secretions, Cold Spring Harbor, N.Y..

Riddle, Oscar (1937) Physiological responses to prolactin. In: Cold Spring Harbor Symposia on Quantitative Biology V: Internal Secretions, Cold Spring Harbor, N.Y..

Riddle, Oscar, Bates, Robert Wesley (December 1936) Prolactin. In: The Proceedings of the Association for Research in Nervous and Mental Disease, December 28 and 29, 1936.

Riddle, Oscar, Lahr, Ernest L., Bates, Robert Wesley (1935) Demonstration of prolactin induced activities which express maternal behavior in virgin rats. In: Proceedings of the American Physiological Society 47th Meeting.

Riddle, Oscar (January 1928) The control of heredity. In: Third Race Betterment Conference.

Riddle, Oscar (1927) Proofs and implications of complete sex-transformation in animals. In: Verhandlungen des I. Internationalem Kongresses für Sexualforschung.

Riddle, Oscar (August 1910) Experiments on melanin color formation: against the current Mendelian hypothesis of color development. In: Verhandlungen des VIII Internationalen Zoologen-Kongresses, Graz.

Book

Riddle, Oscar, Fitzpatrick, F. L., Glass, H. B., Gruenberg, B. C., Miller, D. F., Sinnott, Edmond Ware, eds. (1942) The teaching of biology in secondary schools of the United States; a report of results from a questionnaire. Committee on the Teaching of Biology of the Union of American Biological Societies, Evanston, Ill..

Bates, Robert Wesley, Riddle, Oscar (April 1938) Preparation of prolactin free from other pituitary hormones and preparation of a mixture of other pituitary hormones free from prolactin (Abstract). unknown.

Riddle, Oscar (1938) The share of prolactin in the recognized total of anterior pituitary functions (Abstract). Internationalen Physiologen-Kongresses, pp. 321-322.

Riddle, Oscar (1931) New data on the relation of metabolism to sexuality (Abstract). Archivio Zoologico Italiano.

Riddle, Oscar, ed. (1919) Posthumous works of Charles Otis Whitman, professor of zoölogy in the University of Chicago, 1892-1910; director of Marine biological laboratory at Woods Hole, 1888-1908. Carnegie Institution of Washington publication; no. 257 (I) . Carnegie Institution of Washington, Washington, D.C..