146 



HODGE. 



[Vol. VII. 



TABLE X. 



Series of Experiments to show Effects of a Day's Normal Activity in the 

 Cells of Different Parts of the Nervous System. 



(Corresponding parts in each animal treated in the same manner and compared with 



each other.) 



Experiment. 



Time. 



Occipital Cortex. 



Mean diam. 

 of nuclei. 



Shrink- 

 age. 



PuRKiNjE Cells, 

 Cerebellum. 



Mean diam. 

 of nuclei. 



Shrink- 

 age. 



Spinal Ganglia. 



Mean diam. 

 of nuclei. 



Shrink- 

 age. 



I. 



(Dec. — , '91.) 

 English Sparrow. 



1, male 



2, " 



III. 



(Feb. 17, '91.) 



" Rainy day." 



English Sparrow. 



3, female 



4, male 



IV. 

 (Apr. 22, '91.) 

 English Sparrow. 

 5, female 



II. 



(Dec. — , '91.) 



Pigeon. 



1, male 



2, " 



V. 



(Apr. 28, '91.) 



Pigeon. 



3, female 



4. " 



VI. 



Swallow 



{H. horreorum) 



(June 10, '91.) 



1, male 



2, " 



7.00 A.M. 

 5.30 P.M. 



7.00 A.M. 

 4.30 P.M. 



6.30 A.M. 

 6.30 P.M. 



8.30 A.M. 

 5.30 P.M. 



5.30 A.M. 

 7.30 P.M. 



5.00 A.M. 

 8.00 P.M. 



8.09 Ai 

 6.72 M 



6.69 /x 

 443 A* 



10.59 y- 



9.19 M 



8.85 M 

 6.84 /U 



43% 



69.7% 



36% 



55-5% 



8.06 M 

 7-75 M 



8.31 M 

 6.85 /x 



12.74 M 



10.32 M 



9.12 M 

 6.32 M 



S% 



43% 



51.7% 



12.04 M 

 9-99 M 



54-3 % 



No difference observ- 

 able, hence not 

 measured. 



64-5 % 



10.69 M 

 7-44 M 



15-34 M 

 12.82 y. 



13-88 M 



11.62 [X 



12.00 M 

 9.82 /u 



64% 



49-5 % 



33-3 % 



45-2 % 



