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Relation between the Thymus and the Generative Organs. 79 













Weight after — 







Animal No. 



Weight, 





































Aug. 22. 



38 





51 



64 



88 



113 



140 



152 







days. 





days. 



days. 



days. 



days. 



days. 



days. 









Control Animals, 











grm. 



grm. 





grm. 



grm. 



grm. 



grm. 



grm. 



grm. 



L 





ouy 





340 



397 



495 



498 



Oil 



oyu 



2 



285 



374 





396 



422 



484 



572 



537 



547 



3 



278 



320 





335 



355 



452 



520 



567 



548 



4 



1 <i7 



146 





180 



232 



319 



409 



465 



465 



g 



183 



330 





360 



380 



462 



537 



585 



575 



Average 



221 



296 





322 



357 



442 



507 



546 



545 









Operated Animals. 









1 



243 



382 





435 



407 



469 



537 



607 



622 



2 



135 



176 





177 



235 



284 



354 



350 



360 





230 



373 





405 



435 



487 



552 



607 



600 



4 



152 



286 





320 



365 



402 



485 



520 



565 



5 



217 



360 





402 



387 



482 



525 



606 



615 



Average . 



195 



315 



347 



366 



425 



491 



538 



552 



20 40 60 80 100 120 140 160 ISO 



Fig. 3.— Effect of Thymectomy and Castration on the Growth of Guinea-pigs. 

 (The curves are produced from Experiments 7 and 8, the averages of Experiment 8 and of 

 the second set in Experiment 7 being interpolated to give the approximate average 

 weights . on the desired intervals after operation. The separate portion at the 

 beginning of the curve is due to the fact that the weighings of certain animals only 

 commenced 20 days after operation.) 



