EXPERIMENTS MADE IN 1910 75 



been heated to 145 C., would have been better 

 left for another month or longer, as the organ- 

 isms were not abundant in any of them. In two 

 of those that had been heated to this temperature 

 (Nos. 164, 165), only a small number of single 

 Torula? (about twenty to thirty under each three- 

 quarter-inch cover-glass) were met with; while in 

 another, in addition to the single Torulse, two 

 small groups, with Cocci (Fig. 51, A, B), were 

 found. These three tubes had been at the south 

 window for two months; though the remaining 

 two, that had been heated to 145, had only been 

 there for one month. Yet in one of the latter the 

 single TorulaB were much more abundant, and two 

 groups, containing respectively ten and about fifty 

 corpuscles, were also met with (Fig. 51, C) ; while 

 in the other, though the Torula? were scarce, 

 there were many Fungus-germs different from 

 any that had been previously met with (Fig. 53), 

 though akin to those found in some of the yellow 

 solutions, and which are shown under a lower 

 magnification in Fig. 2. 



This seemed to throw some doubt upon the 

 question of the relative advantage of sunlight and 

 mere diffuse daylight. Further observations will 

 have to be made before a definite decision can be 



