LIST OF ILLUSTRATIONS 



FIGURE PAGE 



11. The Effect of Hypophysectomy on the Microscopic Ap- 

 pearance OF THE Uterus of the Rat 54 



23. The Effect of Hypophysectomy on the Microscopic Ap- 

 pearance OF THE Vagina of the Rat 55 



24. Experimental Obesity in the Rat 77 



25. The Response of the Male Rat to a Growth-promoting 

 Extract of the Pars Glandularis 87 



26. A Comparison of the Response of Male and Female Rats 



to a Growth-promoting Extract of the Pars Glandularis 89 



27. The Effect of a Growth-promoting Extract on the 

 'Dachshund 92 



28. The Effect of Gonadotropic Hormone (Pituitary) on the 

 Ovary of the Immature Rat 113 



29. The Effect of Gonadotropic Hormone (Pituitary) on the 

 Uterus and Vagina of the Immature Rat 114 



30. The Effect of Gonadotropic Hormone (Pituitary) on the 

 Gross Appearance of the Genital Tract of the Immature 

 Male Rat 116 



31. The Microscopic Appearance of the Testis of the Imma- 

 ture Rat after the Administration of Gonadotropic 

 Hormone (Pituitary) 117 



32. The Microscopic Appearance of the Seminal Vesicle of 

 THE Immature Rat after the Administration of Gonado- 

 tropic Hormone (Pituitary) 118 



2^2- The Relationship between the Dose of an Extract of the 



Pars Glandularis and Ovulation IN THE Rabbit . 170 



34. The Effect of Prolan on the Gross Appearance of the 

 Uterus AND Ovary of THE Immature Rat 188 



35. The Effect of Prolan on the Microscopic Appearance of 



the Uterus AND Ovary of THE Immature Rat 189 



36. The Effect of Prolan and of Anterior Pituitary Extract 



ON THE Ovary OF THE Immature Monkey 197 



37. The Effect of Prolan on the Testis and Seminal Vesicle 



OF THE Immature Rat 202 



38. The Effect of Prolan on the Ovary of the Hypophysec- 

 tomized Mature Rat ". 210 



39. The Effect of Prolan on the Testis of the Hypophysec- 

 TOMizED Mature Rat 212 



[ xvi 1 



