3IO CARL RICHARD MOORE. 



5. The relative weight of the hypophysis of normal females is 

 slightly greater than that of the normal males at .,ie end of the 

 first year. 



6. Gonadectomy is followed by a relative reduction in weight 

 of the hypophysis in operated males and females. 



/. Thyroids of normal females are slightly heavier than those 

 of normal males. 



8. Gonadectomy appears to favor growth of the thyroids in both 

 operated males and females. 



9. Adrenals of normal male guinea pigs are approximately 20 

 per cent, greater in weight than those of normal females. 



10. Gonadectomy is followed by a relative decrease in weight 

 of adrenals in both sexes; though slight differences appear in 

 males, the effect is considerably more pronounced in females. 



11. The normal female spleen was found to be slightly heavier 

 than that of the normal male. 



12. Gonadectomy appears to cause a reduced growth of the 

 spleen in both sexes. 



13. The length of the hind-leg bones of the normal male is 

 slightly greater than that of the normal female. 



14. Castration favors, to a slight extent, the growth of leg bones 

 in operated males, though the differences appear to be relatively 

 insignificant. 



15. Spaying is conducive to bone growth in operated females; 

 the relative differences are considerably more pronounced than 

 those following castration. 



1 6. Repetition of the experiment is deemed highly advisable 

 before the results, herein reported, are accepted as indicative of 

 general principles. 



BIBLIOGRAPHY. 

 Bell, W. B. 



'19 The Pituitary. Wm. Wood & Co., New York. 

 Cimorini, A. 



'07 Sur 1'Hypertrophie de 1'hypophyse cerebrale chez les animaux thyreoid- 



dectomises. Arch. Ital. de Biol., Vol. 48. 

 Fischera, G. 



'05 Sur 1'hypertrophie de la glande pituitaire consecutive a la castration. 



Arch. Ital. de Biol., Vol. 43. 



'10 Recherches experimentales sur les processus de reparation et de com- 

 pensation a la suite d'une intervention sur 1'ovarii. Arch. Ital. de 

 Biol., Vol. 53. 



