PHYSIOLOGICAL PROPERTIES OF THE GONADS. 



295 



general. The body length of each animal is given in Table II., 

 as well as the average lengths for the different groups as a whole. 

 From the average of each group one sees that the groups have 

 essentially the same relationship to each other as the average 

 weight determinations i.e., in the order, normal males > normal 

 females > spayed females > castrated males. This indicates that 

 the weight as a whole is due to a general growth rather than in 

 certain groups to excess fat deposition as a secondary result from 

 some specific action of the glands of internal secretion. 



V. WEIGHT OF THE HYPOPHYSIS. 



According to many investigators there is a more or less specific 

 effect upon the hypophysis from gonadectomy; however, many of 

 the conclusions found in the literature are diametrically opposed. 

 It appears that too often merely gross weight comparisons of this 

 small gland from two animals are used rather than a comparison 

 of percentages of body weight; where small numbers of animals 

 are used the latter method would offer more adequate means of 

 studying specific reactions of the gland. 



TABLE II. 



SHOWING INDIVIDUAL WEIGHTS OF ORGANS OF INTERNAL SECRETION 



AND LENGTHS OF BONES AND THE AVERAGES FOR THE SAME FOR 



THE VARIOUS GROUPS. 



Normal Males 



