WEIGHT OF testes: WILD NORWAY 



375 



9. Weight of eyeballs — wild Norway. A manuscript by Jackson 

 ('11) furnishes a short series of data for the weight of the eyeballs — • 

 table 203. 



Although the records in this table are few in number they show 

 that for like body weights the eyeballs in the wild Norway are 

 lighter than those in the Albino. 



50 



100 



150 



200 



250 



300 



350 



400 



450 



Chart 71 Showing the weight of the testes of the Norway rat compared with 

 that of the albino rat. 



Norway, observed 



Albino, calculated 



10. Weights of the ductless glands and gonads. Some observa- 

 tions on these organs have been made by Hatai (14 a) but more 

 extensive data are needed. In this connection emphasis is put 

 on the fact that the animals examined must be strictly wild and 

 must not have been caged even for a few days — as the ductless 

 glands tend to be very responsive to caging. 



