EFFECT OF COPPER UPON WATER BACTERIA. 63 



Table XIII. — Effect of copper sulfate upon Bacillus sublanatus. 





Check. 



1 part copper sulfate to — 



Duration of exposure to action 

 of copper sulfate. 



10,000 

 parts of 

 water. 



25,000 

 parts of 

 water. 



50,000 

 parts of 

 water. 



100,000 

 parts of 

 water. 



500, OCO 

 parts of 

 water. 



1,000,000 

 parts of 

 water. 





Colonies. 

 12, 500 

 12, 000 

 12, 500 

 40, 000 



Colonies. 



780 















Colonies. 



2,700 















Colonies. 



2, 100 















Colonies. 



1,100 











1 



Colonies. 



2,100 



35 











Colonies. 

 1,500 





190 



6 hours 



80 



94 hours 











Table XIV. — Effect of copper sulfate upon Micrococcus radians. 





Check. 



1 part copper sulfate to — 



Duration of exposure to action 

 of copper sulfate. 



10, 000 

 parts of 

 water. 



25,000 

 parts of 

 water. 



50,000 

 parts of 

 water. 



100,000 

 parts of 

 water. 



500,000 

 parts of 

 water. 



1,000,000 

 parts of 

 water. 



hour 



Colonies. 

 1,200 

 1,200 

 1,400 

 1,900 



Colonies. 



2,700 



1 











Colonies. 



10, 500 















Colonies. 



1,700 



1 











Colonies. 



3,800 



20 











Colonies. 



2,500 



85 











Colonies. 

 2,800 



2 hours 



10 





1 



24 hours 











Table XV. — Eff^ect of copper sulfate upon Pseudombnas radicicola {alfalfa] 





Check. 



1 part copper sulfate to— 



Duration of exposure to action 

 of copper sulfate. 



10,000 

 parts of 

 water. 



25, 000 

 parts of 

 water. 



50,000 

 parts of 

 water. 



100,000 

 parts of 

 water. 



500,000 



■parts of 



water. 



1,000,000 

 parts of 

 water. 





Colonies. 



270 



210 



220 



1,175 



Colonies. 



300 















Colonies. 



330 















Colonies. 



425 















Colonies. 



3,700 















Colonies. 



700 















Colonies. 

 290 









6 liours . . . 







24 hours 











Table XVI. — Effect of copper sulfate upon Bacillus violaceus laurentius. 





Check. 



1 part copper sulfate to — 



Duration of exposure to action 

 of copper sulfate. 



10,000 

 parts of 

 water. 



25,000 

 parts of 

 water. 



50,000 

 parts of 

 water. 



100,000 

 parts of 

 water. 



500,000 

 parts of 

 water. 



1. 000, 000 

 parts of 

 water. 



hour 



Colonies. 



7,200 



5,300 



6,800 



40, 000 



Colonies. 



120 















Colonies. 



480 















Colonies. 



740 















Colonies. 



470 















Colonies. 



210 



1 











Colonies. 

 520 





25 



6 hours 







24 hours 











Table XVII. — Eff^ect of copper sulfate upon Pseudomonas amethystina. 





Check. 



1 part copper sulfate to— 



Duration of exposure to action 

 ■ of copper sulfate. 



10,000 

 parts of 

 water. 



25,000 

 parts of 

 water. 



50,000 

 parts of 

 water. 



100,000 

 parts of 

 water. 



500.000 

 parts of 

 water. 



1,000,000 

 parts of 

 water. 





Colonies. 

 140 

 190 

 240 



Colonies. 



540 















Colonies. 



90 















Colonies. 

 70 

 1 

 

 



Colonies. 



580 



3 











Colonies. 



670 



3 



1 







Colonies. 

 660 



2 hours 



15 



6 hours 



1 



24 hours 













100— VII 



