--2S-- 



as follows: 

 Filter 

 70 

 71 

 72 

 73 

 74 

 75 

 76 



Wave -^-'n.- 



(.(.oa ~ "7 & 



b 1(1 O - & % 00 



ac, - *> 



Color 



Distance 



osure 



AJL 



CJ 



+ 



H y oo - 5 ' 



^ 6 ~ Lf -J u0 



- -i 000 



ft. 



r 



r 

 t 



t 



f- 



t 



1- 



The ri.pid reBpcne-- in. t>m re'. v;s aurpriging sinoe the energy 

 must have be-n leea '.han in sunlight. It took 20 minutes to get a 

 noticeable reaction in - Jie orange and yellow in sunliriht the day befor 

 Here with the arc as a source of light it took hut thre minutes. 

 It toc-y 30 minutes to get the resporv e in the red that was produoed 

 by the arc in 5 minutes. The explanation rni^ht be that the 

 colonies were niore sensitive to light nn April 6. It was unfortu- 

 nate that tjiis day vrae oloudy so that the experiment -*ith sunlight 

 o uld not be repeated. That the ability of the colonies to re- 

 spond is dependent to a large extent en their own condition as 

 aflected by external factors of their invironment was shown striking- 

 ly by the fact that organisims kept over night in a small mouth 

 bottle -vould not respond to -my lirjit stimulus, while o th-TS cf the 

 same collection ?ept in shallow pans reacted rapidly. Mast ( 

 found considerable difficulty in ,;etting consistent responses on 

 account of the gre t change in the reactions of . is organisms with 

 Change in their con di lion due supposedly to the li, ht and temp ^r-s 

 oonditons. 



