XIV 



LIST OF ILLUSTRATIONS 



27. Uterus of pseudo-pregnant rabbit ..... 54 



28. Photograph of mammary gland of pre-pubertal rabbit , 55 



29. Photograph of mammary gland of rabbit in first oestrus . 56 



30. Photograph of mammary gland of rabbit 12 days pseudo- 



pregnant 57 



31. Photograph of mammary gland of rabbit after pseudo- 



pregnancy ........ 58 



32 . Photograph of mammary gland of rabbit 23 days pregnant 59 



33. Section of lobule of mammary gland of rabbit during 



pseudo-pregnancy ....... 60 



34. Section of mammary gland of 29 days pregnant rabbit . 61 



35. Endometrium of human uterus on the first day of men- 



struation ......... 62 



36. Normal uterus of rat ....... 71 



37. Uterus of rat after ovariectomy . . . . . y^ 



38. Uterus of mouse after pre-pubertal ovariectomy . . 74 



39. Vagina of mouse after pre-pubertal ovariectomy . . 75 



40. Ovary of rat after transplantation to the peritoneum . yy 



41. Uterus of rat after transplantation of the ovary . . 79 



42. Uterus and vagina of ovariectomized mouse injected 



with oestrin ........ 94 



43. Ovarian tissue re-formed after double ovariectomy . . 100 



44. Diagram showing the growth curves and oestrous cycle 



histories of rats injected with oestrin during vitamin 



B deficiency an oestrus . . . . . .117 



45. Ovary of mouse sterilized by exposure to X-rays when 



three weeks old . . . . . . .139 



46. Ovary of mouse sterilized when three weeks old . . 140 



47. Ovary of mouse sterilized by exposure to X-rays when adult 141 



48. Ovary of mouse sterilized at birth ..... 142 



49. Uterus of mouse sterilized at weaning time . . . 143 



50. Frequency polygons for length of oestrous cycle before 



and after X-ray sterilization . . . . .144 



51. Ovary of adult mouse injected with sodium hydroxide 



extract of anterior pituitary body . . . .154 



