Relation to Factor Limiting Bacterial Activity in Soil. 443 

 Bacteria in millions per gramme. 





At begin- 

 ning. 



After 

 32 days. 



After 

 63 days. 



After 

 92 days. 



After 

 124 days. 



After 

 153 days. 



After 

 181 days. 



After 

 232 days. 









6 -6 



391 



291 



307 



280 



203 



261 



118 



Bacteria 



15 



1504 



472 



440 



259 



98 



102 



59 





235 



464 



386 



312 



315 



174 



266 



159 





218 



379 



314 



271 



289 



165 



324 



142 





253 



501 



262 



313 



260 



191 



264 



116 



Yort. microstoma 



186 



453 



216 



201 



156 



65 



119 



84 





178 



599 



412 



274 



409 



193 



242 



178 



Flagellates 



82 



374 



327 



416 



319 



127 



188 



132 



U. + '70 



8-5 



204 



154 



169 



128 



116 



159 



103 





After 



After 



After 



After 



After 



After 



After 





284 days. 



324 days. 



360 days. 



383 days. 



419 days. 



486 days. 



519 days. 





50 



55 



lost 



115 



76 



87 



57 





lost 



27 



40 



36 



20 



45 



33 





96 



102 



143 



104 



95 



134 



70 



Col. steinii 



77 



138 



112 



224 



133 



138 



130 



Col. maupasii ... 



75 



116 



126 



131 



114 



133 



91 



Yort. microstoma 



35 



86 



39 



95 



67 



91 



58 



Amoeba 



160 



135 



]29 



242 



160 



168 



118 



Flagellates 



54 



86 



93 



120 



75 



124 



123 



U. + 70 



84 



83 



86 



111 



76 



93 



68 



content was maintained over a very long period — 366 days — and is perhaps 

 the most surprising and unexpected result of the whole investigation. 



