﻿BOTANICAL GAZETTE 



precipitation during the period that the experiments were 

 carried on. 



It will be seen by an examination of table I that there was some 

 variation in the bacterial content during the latter part of October 

 TABLE I 



7,469,450 

 29,781,548 



{ U bdowi?o C Z h en 

 /Soil completely 



owfeil December 



! December 



2,035,532 

 3,425,080 



haw and subsequent 

 , frost 



/Cold weather January 



',993,570 Upper 3 inches frozen 

 5,298,373 Upper * men frozen 

 5,717,113 Completely thawed 



and the first part of November, while the soil was still unfrozen. 

 This variation seems to have been independent of the moisture 

 content. On November 17, some days after the first frost, a distinct 

 increase in the number of bacteria was shown, accompanied by a 

 great increase in moisture. During the subsequent period of mild 



