EFFECT OF (UPPER UPON WATER BACTERIA. 

 T.\BLK III. — Etf'ecl of copper sulfate upon Bacillus mesentericus. 



61 



Duration of t-xposure to action 

 of copper .sulfate. 



hour . . 

 2 hours . 

 (■) hours . 

 24 hours 



1 part copper sulfate to — 



Check. ■ 10,000 25,000 50,000 

 parts of parts of parts of 

 ; water. water. water. 



Colonies. | Colonies. 



300 3«0 



2S0 170 



430 10 



1,350 



Colonies. 



400 



310 



290 







100,000 .500,000 1,000,000 

 parts of parts of j parts of 

 water. water. water. 



Colonies. Colonies. Colonies. | Colonies. 



520 280 440 - 470 



440 2i;0 340 I 3t;o 



320 ; 2.50 310 I 390 



.530 3 4 1 30 



Table IV. — Etfed of copper sulfate upon Bacillus mesentericus fim-iis. 



Taulk V. — Effect of copper sulfate upon Streptococcus pyogenes. 



Table VI. — Effect of copper sulfate tipon Bacillus .vibtilis. 



1 part copper sulfate to — 



Duration of exposure to action , ^j^g^.jj 

 of copper sulfate. j 



Colonies. 



hour ' 310 



2hours I 220 



(1 hours ! 330 



24hours ; 2,800 



10,000 



parts of 



water. 



Colonies. 



80 



1 



1 



1 



25,000 



parts of 



water. 



Colonies. 



20 



3 



1 







Table VII. — Effect of copper sulfate upon Bacillus prodigiosm. 



100— VII 



