82 



Mr. Hainan and Dr. Marshall. 



Animal No. 



Weight, Oct. 21. 



After 28 days. 



Test, and epid. 



Thymus. 





Control Animals. 









grim. 



grm. 



grm. 



grm. 



1 



277 



332 



1 -650 



0-330 



2 



253 



308 



0-820 



0-330 



3 



217 



233 



0-340 



0-120 



4 



298 



335 



1 -065 



0-290 



5 



205 



282 



0-520 



0-375 



6 



260 



315 



0-770 



0-340 



7 



348 



392 



2 -556 



0-290 



8 



272 



370 



1 -695 



0-250 



9 



312 



350 



2 -230 



0-235 





271 



324 



1 *294 



0-284 





Operated Animals. 









grm. 



grm. 



grm. 





1 



270 



342 



1 -010 





2 



277 



350 



1 -174 





3 



227 



303 



1 -535 





4 



287 



281 



044 





5 



207 



278 



0-470 





6 



320 



355 



* 1 -186 





7 



370 



425 



2-504 





8 



276 



362 



1-610 





9 



240 



298 



1 -125 







275 



332 



1-239 





1 r»„ e 



o 



o° 



Fig. 5.— Effect of Eemoval of Thymus on the Weight of the Testis. 

 (Clear circles, control animals ; black circles, operated animals. Vertical, weight of testes 

 and epididymes in grammes ; horizontal, weight of animal in grammes.) 



