340 



Profs. Percy Frankland and Marshall Ward. 



4 3 6 



100 c.c., and exposed forthwith, one behind CuS0 4 , the other behind 

 K. bichromate. 



No direct sunlight was allowed to fall on the cultures, cardboard 

 shutters being used, and the mirrors took the light from the sky 

 only. The day was hot and sunny, with heavy clouds occasionally 

 and dull rainy afternoon, the following being the temperature, &c., 

 records. 



The cultures were examined at 2 P.M., 5 P.M., 10 P.M., and 9 A.M. 

 next morning, with results as given below : 



No germination had occurred in either culture at 2 P.M., nor even 

 at 5 P.M. ; but at 10 P.M. both had germinated, and the condition of 

 affairs was as follows : 



In the blue culture the longest rods were 17*6 /*, and the shortest 

 8'8 ft, giving a mean of 13'2, which was about the average length. 



In the red culture, however, I found filaments 44 p, 76 p, 110 /*, 

 and even 150 ft. in length. Mean of extremes = 97 fi. 





