78 Mr. Hainan and Dr. Marshall. 



Set 2. 











Weight after — 









"Wpio-Vif, 

















Animal No. 



julv 25 





















28 



66 



79 



92 



116 



141 



168 







days. 



days. 



days. 



days. 



days. 



days. 



days. 







Control Animals. 











grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



1 



155 



278 



352 



337 



365 



408 



512 



537 



2 



160 



250 



343 



359 



367 



448 



525 



555 



3 



260 



231 



298 



272 



290 



334 



407 



445 



4 



133 



212 



286 



285 



300 



378 



450 



417 



5 



155 



258 



355 



368 



370 



450 



534 



574 



6 



126 



221 



276 



287 



312 



353 



377 



357 



7 



220 



321 



395 



393 



394 



452 



522 



573 



8 



186 



256 



336 



330 



340 



419 



478 



475 



Average 



174 



253 



330 



329 



342 



405 



475 



490 







Operated Animals. 









1 



181 



257 



318 



323 



327 



382 



428 



490 



2 



190 



286 



346 



363 



382 



437 



480 



552 



3 



136 



235 



291 



302 



327 



358 



407 



390 



4 



175 



268 



340 



337 



340 



400 



450 



487 



5 



156 



270 



377 



383 



410 



430 



517 



570 



6 



173 



250 



268 



273 



297 



327 



383 



395 



7 



170 



277 



386 



380 



410 



435 



512 



567 



8 



212 



275 



336 



346 



287 



379 



423 



470 



Average 



174 



264 



333 



338 



347 



393 



450 



490 



Experiment 8 (fig. 3) : Effect of the Simultaneous Removal of the Testes and 

 Thymus on the Growth of the Animal. — The animals in this experiment were 

 treated as in the previous experiment, the operations extending from July 30 

 to August 5. The first collective weighing took place on August 22. There 

 were 5 operated and 5 control animals. The results obtained in this experi- 

 ment confirm the findings in Experiment 7. 



