72 



Mr. Hainan and Dr. Marshall. 



Eeference to the data below shows that thymectomy has no effect upon 

 growth, and that castration has little, if any, effect. 



Animal No. 



Days after fl 

 0. 



rst weighing. 

 63. 



Weight when 

 killed. 



Weight 

 of testes 

 + epididynies. 



Weight of 

 thymus. 



1 



3 

 4 

 5 

 6 

 7 

 8 

 9 

 10 



1 

 2 

 3 

 4 



5 

 6 

 7 



grm. 



202 



157 



164 



182 



127 



170 



180 



185 " 



221 



191 



Control Ai 



grm. 

 349 

 365 

 385 

 310 

 275 

 412 

 395 

 410 

 452 

 452 



aimals. 



grm. 

 375 

 380 

 420 

 320 

 290 

 420 

 410 

 425 

 470 

 468 



erm. 

 1 -25 



1 "43 



2 -05 



1- 02 

 0-376 



1 -67 



2 08 

 1 -82 



2- 38 

 2-43 



grm. 

 253 

 0-395 

 0-392 

 0-197 

 0-390 

 0-350 

 -380 

 0-300 

 -395 

 0-390 



168 



214 

 211 

 155 

 185 



235 

 220 

 204 



380 



Castrated A 



401 

 405 

 320 

 377 

 462 

 435 

 292 



398 



.nimals. 



430 

 420 

 330 

 423 

 485 

 470 

 335 



1 -651 



-344 



0-580 

 0-750 

 0-405 

 0-507 

 0-680 

 0-710 

 0-416 



1 



2 

 3 

 4 

 5 

 6 



203 



1 



135 

 154 

 154 

 167 

 142 

 183 



385 



'hymectomise 



440 

 395 

 315 

 384 

 347 

 394 



413 



d Animals. 



450 

 410 

 325 

 390 

 355 

 400 



2-185 

 1-560 

 1 -200 

 1 -705 

 0-835 

 1 -260 



0-578 



156 



379 ' 



388 1 -457 





