No. 2.] 



CHANGES IN NERVE CELLS. 



153 



TABLE XI. 



Honey-Bee Experiments. 



Antennal Lobe. 

 Number Mean diameter 



of bee. of ""<='e'- 



■ I 4-53/^ 



2..... 3-25 " 



Diff 1-28" 



.y \ 



Diff. 



Diff. 



f 7- 



Diff. 



9- 

 ^ 10. 



Diff. 



12 (" Lively bee ").... 

 Diff 



4.09 " 



2-94 " 

 I.I5" 



4.65 " 



3-25 " 

 1.40 " 



4.60 « 



3-90 " 

 .70" 



4.56 " 



^^96" 



.60" 



. 4.46" 

 . .11" 



3- 

 10. 



Diff. 



Diff. 



Minimal 



(barring No. 12). 



. . . 4.09 M 



.... 3:96" 



.... .13" 



Maximal, 

 . . . . 4-65 M 

 . . . .^^ " 

 .... 1. 71 " 



Per cent 

 of shrinkage. 



64% 



73% 

 73% 

 34% 

 33% 

 8% 



9% 

 75% 



Arranged, as they were, at random, we have the right to pair 

 any morning bee with any evening bee. This gives us as a 

 minimal shrinkage nine per cent, as a maximal seventy-five per 

 cent Although I do not attach exact values to these figures, 

 they express a truth easily observed in the specimens; viz. 

 the wide difference between them. The fact is brought out by 

 comparing morning bees with morning bees, and evening bees 

 with evening bees. Here we observe that the morning diam- 

 eters, 4.09, 4.53, 4-46, 4-56, 4.60, 4.65, are somewhat more uni- 

 form than the evening diameters, 2.94, 3.25, 3.25, 3.90, 3.96 (4.35) ; 

 the greatest difference between morning diameters being .56 ^, 



