CHAPTER VI 



FURTHER EXPERIMENTS MADE IN 1910 



THE numerous tentative experiments conducted 

 during last March and April with different sam- 

 ples of sodium silicate, and the satisfactory results 

 obtained with one of these samples, made me wish 

 to perform further experiments with high tem- 

 peratures and hermetically-sealed tubes, making 

 use of this particular sample, 1 and also employing 

 it in diminished quantity, so that the solutions 

 should yield only a very small amount of sedi- 

 ment. I hoped with it to obtain positive results 

 in a much shorter time and in a still larger pro- 

 portion of the experiments; as well as, by the 

 modification indicated, to be able to find the organ- 

 isms, when present, more easily in the scanty 

 deposit. 



Some time previously Professor R. T. Hewlett, 

 of King's College, had written to me expressing 



1 That obtained from Messrs. Allen and Hanbury, of Vere 

 Street, W. 



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