374 



REACTIONS OF DAPHNIA PULEX TO LIGHT AND HEAT. 



TABLE IV. 



EXPERIMENTS TO TEST THE INFLUENCE OF HEAT UPON THE MOVEMENTS OF DAPHNIA. 



Heated Surface 5 cm. from + End of Trough. 



Temperature of Water at Beginning of Experiments 21 C. for all Regions of Trough. 



Temperature of Water at End of Experiments 28 C. at + End of Trough, 25 C. at End. 



Period 3 min. Dec. 12, 1901, 7.45 P.M. 



Movement for series .475 (i.e., .475 of a space toward the - end, away from heater). 



TABLE V. 



CHECK EXPERIMENTS. 



Period 3 min. Dec. 13, 1901, 8 P.M. 



EXPERIMENTS TO TEST INFLUENCE OF HEAT WHEN HEATED SURFACE WAS 20 CM. FROM + END OF THOUGH. 



Temperature of Water at Beginning of Experiments 22 C. 

 Temperature of Water at End of Experiments 26 C. at + End of Trough, 25 at - End. 



Movement for series 0.150. 



