260 



GROWTH OF PARTS AND ORGANS 



Pineal gland. After removal of the overlying bone and pushing 

 aside the vessels, the pineal is picked up with a very fine forceps 

 and the peduncles severed. On account of its small size and the 

 effect of slight differences in the adherent moisture, the absolute 

 weights for this organ are the least trustworthy of any. As 

 compared with the other endocrme glands, the growth of the 

 pineal is very small. (Hatai MS). (Table 149.) 



Weights of parts of the female reproductive tract {Osterud MS). 

 This study was based on 155 females; of these 125 were virgin 

 and the remainder had given birth to one litter. Under pre- 

 cautions to prevent drying, the ovaries and tubes were isolated 

 by severing the tubes close to the tip of the uterine horn. 



These were dissected apart, and separated from extraneous 

 tissue. The uterus and vagina were similarly isolated and then 

 were separated by transection of the latter in a plane just missing 

 the tip of the cervix. The weights were taken in closed bottles. 

 The values obtained are given in table 150. 



When the data on the weight of the ovaries are compared with 

 those in table 146 it is seen that they tend to run high, especially 

 for the heavy body weights. This difference would suggest the 

 formation of a larger number of corpora in the series examined 

 by Osterud. 



9. Weight of thymus on age: Table 151. On length: table 152. 



TABLE 151 



Giving the weight of the thymus in grams- — sexes combined — for the first 400 days of 



life. See Chart 48 



