Relation between the Thymus and the Generative Organs. 75 



Experiment 5 (fig. 2): Effect of the Removal of the Thymus on the Weight 

 of the Testes and on the Groivth of the Animal. — To annul the operative effect 

 the control animals were pseudo-thymectomised. The experiment started 

 on May 27 and finished on July 8. There were 7 thymectomised animals 

 and 6 pseudo-thymectomised in this set. The results obtained support the 

 contention that thymectomy has no effect upon growth. 



Animal No. 



Weight, May 27. 



Weight 

 after 42 days. 



Weight of testes 

 + epididymes. 



Weight 

 of thymus. 





Control Animals. 









grm. 



grm. 



grm. 



grm. 



i 



210 



325 



1 -420 



-325 



2 



177 



316 



1 -155 



0-510 



3 



190 



267 



0-610 



-315 



4 



151 



238 



-470 



235 



5 



162 



290 



1 012 



0-320 



6 



190 



338 



1 380 



"283 





180 



296 



1 -008 



0-331 





Thymectomised Animals. 





1 



141 



265 



0-773 





2 



227 



307 



1 -112 





3 



128 



238 



-313 





4 



153 



257 



-574 





5 



197 



287 



-880 





6 



150 



245 



-527 





7 



187 



330 



1 -363 





1 



169 



276 



0-791 





Experiment 6 (fig. 2) : Effect of the Removal of Thymus on the Weight of 

 the Testes and on the Groivth of the Animal. — Xine normal animals and 14 

 thymectomised were used in this set. The operations were performed 

 June 19-26. The experiment started on July 1 and ended on July 25. 

 The evidence supports Experiment 5 with regard to growth. The effect on 

 the testes is here in accordance with Xoel Paton's results. 



