688 



P. W. GAMBLE AND F. W. KEEBLE. 



Table XI. — Experiment 

 August 19th, 20tli. — Effects of darkness, scattered, and red light 



August 19tli. 



12.30 p.m. 



A. Black-brown 



T. Ground pale yellow; net 

 work red and green; blue 

 spots fairly numerous, with 

 clear lialos 



B. Similar to A. 



Green streaky network 

 R. Yellow marginal chrom.; some 

 blue spots with dense red 

 mass round them 



C. Dark olive-brown 



T. Red and green patches 



R. Chrom., red with green, and 



some with yellow centres; 



blue spots regular, some with 



dense red halos 



D. Dark brown 



T. Ground reddish ; network red 

 and green ; blue spots numer- 

 ous, without halos 



12.45. 



E. Dark brown 



R. Liglit brown ground; red and 

 green network ; few blue 

 spots without halos 



F. (A control.) Same as E 



Eyes amputated; no obvious 

 microscopical change; put 

 in drip in dark 



Put in drip in dark 



Examined microscopically, 

 no cliange ; eyes painted 

 with AgNOg; expansion 

 of light frosted green 

 branches concealing red 

 reticulum 



Put in drip in dark 



3.50 p.m. 

 Very sick ; put in dark (see 

 below). 



Dark brown ; put in open 

 in white porcelain dish 

 (see below). 



3 p.m. 



Eyes painted wnth AgNOj; 

 T. Chrom. green cen- 

 tres and branches more 

 marked ; red less 



marked ; put in drip. 



3.15 p.m. 

 Eyes amputated by squeez- 

 ing ; no change. 



3.50 p.m. 



Good nocturne; R. Fine 



green network ; red 



more contracted ; blue 



spots with 

 branches. 



blue-green 



