1906.] 



in Albinoes and Pigmented Animals, etc. 



115 



resistant to " pigmented " nucleo-proteid than they are to " albino " nucleo- 

 proteid. 



If the idiosyncratic animals are included, however, the results are in both 

 cases reversed. The rejected experiments are 63 and 172 (Table IV), 162 

 (Table III), and 141 (Table I). An inspection of the figures given in the 

 tables will show that these individuals were markedly idiosyncratic, for 

 rabbits Nos. 141, 63, 172, and 162 were respectively three, six, eight, and 

 twelve times more resistant than the average of their fellows injected with the 

 same solution at the same time. They clearly stand above their fellows as 

 marked mutations, and must therefore be excluded in any statement of a 

 mean result. 



Stating the results described above in a generalised form, they may be 

 expressed as follows : that both albino and pigmented individuals are more 

 resistant to nucleo-proteids obtained from individuals of their own race than 

 they are to those obtained from the alternative source. 



In the following table (VII) the group mean doses extracted from Table VI 

 are arranged to illustrate the results just stated ; and, in addition, for the 

 purposes of a later discussion, there is also included the weight of the testes 

 employed in the preparation of the different solutions used. The idiosyn- 

 cratic animals are not included. 



Table VII. — To Illustrate, in the Case of both Albino and Pigmented Animals, 

 the Eelative Eesistance to " Albino " and " Pigmented " Nucleo-proteids. 







Mean dose when 







Mean dose when 



Solution 



Weight of 



injected with 



Solution 



Weight of 



injected with 



used. 



testis. 



" albino " nucleo- 

 proteid. 



used. 



testis. 



" pigmented " 

 nucleo-proteid. 





Albinoes. 







grammes. 



c.c. 





grammes. 



c.c. 



P 



1-0 



0-235 



N 



0-6 



0-330 



L 



3-2 



0*458 



O 



2-9 



0-286 



M 



4-2 



0-380 



T 



5-2 



0-420 



S 



5-0 



1-000 



K 



5-5 



0-705 



M TgCf} 3 - 35 



Mean of the In .ki o 

 means / 



Mean weight 1 o ./r 

 of gland J 



Mean of the \ ~ . „r 

 means J 





Pigmented Individuals. 





P 



1-0 



0-138 



N 



6 



0-206 



L 



3 2 



0-345 







2-9 



0-220 



M 



4-2 



0*260 



T 



52 



0-410 



S 



5-0 



0-450 



K 



5-5 



0-484 



Mean of the m< 



3ans -298 



Mean of the me 



ans -330 



