1906.] 



in Albinoes and Pigmented Animals, etc. 



Ill 



pair of groups (that for the albinoes and pigmented individuals) are also 

 homogeneous. The sequel will show that the conclusion is the same by either 

 method. All group comparisons must be made not only with animals injected 

 with the same solution, but with the same solution of the same age, because 

 the strength of the solution varies with its age {infra, p. 119). Below, in 

 Table VI, I give the result in a tabulated form, of obtaining the mean 

 dose required to kill albinoes and pigmented animals respectively with each 

 of the solutions used (group mean doses). The means are calculated from the 

 data given in Tables I to V, pp. 125 — 129. 



Table VI. 



Solution. 



Age of 

 solution.* 



Pigmented animals. 



Albinoes. 



Mean dose 

 per kilogramme 

 of body weight. 



Experiments. 



Mean dose 

 per kilogramme 

 of body weight. 



Experiments. 



Seri« 

 I 



3S 1.— CO 





 5 



7 

 2 



jries 2. — 





 

 





 

 2 

 

 2 

 



ntinuous but slo 



3-68 

 1-18 



0-76 

 0-52 



[ncremental dos 

 death 



-484 or '92f 

 0-345 

 0-26 



0-206 



0-22 



0-38 



0-138 

 -45 or 2 -40f 

 -41 or 1 -75f 



w injections unt 



19—23 

 32, 34, 36 



43 

 57 



es, usually of 0* 

 results (Methoc 



59—64, 63 



83,84 



86, 89, 90, 92, 94, 



96,98 



102, 104, 106 



108, 110, 113, 114 



J 16— 120, 122 



136—139 



161, 162, 163 



171, 172 



il death results ( 



4-4 

 1-41 



4-28 

 3 -21 or 7 *37f 



1 c c. at 2' inten 

 IB). 



-705 or 1 -83f 

 0-458 

 0-38 



0*33 

 0-286 

 0-58 

 -235 or '437f 

 1-0 

 -42 or 2 -If 



Method A). 



24—27 



29, 30, 31, 33, 35, 



37 



40—42 

 53, 54, 56 



fals until 



65— 67 



77, 78, 80—82 



85, 87, 88, 91, 93, 



95, 97, 99, 100 



101, 103, 105, 107 



109, 111, 115 



121 



14,0—141 



164, 165 



173, 174 



J 



K 



L 



M 



N 







P 



s 



T 



1 



* The figures under column " Age of solution " have the following meaning : — = solution 

 used on day of preparation ; 2, 5, 7, etc. = solution used on the 2nd, 5th or 7th, etc., day after 

 that of preparation and exclusive of it. 



f The alternative figures are rendered necessary by the appearance in certain experiments 

 (indicated by their reference number being in italics) of individuals of marked idiosyncrasy. 

 The lower figure is the result of excluding these experiments from the calculation. 



In arriving at the results tabulated above (Table VI, f ) I have, in the 

 case of certain experiments where the influence of idiosyncrasy manifested 

 itself, given two alternative mean results, in one of which the idiosyncratic 

 animals have been excluded and in the other included. But whichever of 



