EFFECT OF COPPER UPON WATER BACTERIA. 

 Table III. — Effect of copper sulfate upon Bacillus mesentericus. 



61 





1 part copper sulfate to- 



Duration of exposure to action 

 of copper sulfate. 



Check. 10,000 

 parts of 

 water. 



25,000 

 parts of 

 water. 



50,000 

 parts of 

 water. 



100,000 j 500,000 

 parts of parts of 

 water. water. 



1,000,000 

 parts of 

 water. 





1 



Colonies, i Colonies. 



300 1 380 



280 1 170 



430 i 10 



1,350 



Colonies. 



400 



310 



290 







Colonies. 

 520 

 440 

 320 

 530 



Colonies. Colonies. 



280 440 



260 340 



250 310 



3 4 



Colonies. 

 470 



2 hours 



360 



6 tiours 



390 





30 











Table IV. — Effect of copper sulfate upon Bacillus mesentericus fuscus. 





Check. 



1 part copper sulfate to — 



Duration of exposure to action 

 of copper sulfate. 



10,000 j 25,000 50,000 

 parts of parts of parts of 

 water. water. water. 



100,000 

 parts of 

 water. 



500,000 

 parts of 

 water. 



1,000,000 

 parts of 

 water. 



hour 



Colonies. 



30 







Colonies. Colonies. 



40 1 25 



5 50 



Colonies. 

 25 

 10 

 5 

 45 



Colonies. 



50 



3 



5 







Colonies. 

 20 



Colonies. 





i i 



6 hours 



2 1 1 30 



2 i 1 



24 hours 



70 1 110 70 



- '0 1 «n 













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



1 part copper sulfate to — 



Duration of exposure to action 

 of copper sulfate. 



Check. 



10,000 

 parts of 

 Avater. 



25,000 

 parts of 

 Avater. 



50,000 

 parts of 

 Avater. 



100,000 

 parts of 

 Avater. 



500,000 1,000.000 

 parts of j parts of 

 Avater. i Avater. 



hour 



2 hours 



Colonies. 

 180 

 210 



Colonies. 



875 















Colonies. 



875 















Colonies. 



300 



290 



• 280 



390 



Colonies. 

 250 

 180 

 230 

 150 



Colonies. 



90 

 180 

 240 



10 



Colonies. 

 180 

 180 



6 hours 



140 

 35 



160 





20 







Table YI. — Effect of copper sulfate upon Bacillus subtilis. 



Duration of exposure to action } pi, „,,v 

 of copper sulfate. \ '^''^^'~^- 



1 part copper sulfate to- 



10,000 

 parts of 

 Avater. 



25,000 

 parts of 

 Avater. 



50,000 



100,000 



500,000 



parts of 



parts of' 



parts of 



Avater. 



water. 



Avater. 



Colonies. 



Colonies. 



Colonies. 



130 



85 



100 



30 



120 



70 



.25 



85 



50 



30 



70 



65 



1,000,000 

 parts of 

 Avater. 



hour . . 

 2 hours . 

 6 hours . 

 24 hours 



Colonies. 



310 



220 



330 



2,800 



Colonies. 

 80 

 1 

 1 



1 



Colonies. 



20 



3 



1 







Colonies. 

 30 

 10 



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







1 part copper sulfate to— 



Duration of exposure to action ' rv,„,,i- 

 of copper sulfate. \ '-^e'-^- 



10,000 

 parts of 

 water. 



25,000 50,000 

 parts of parts of 

 water. water. 



100,000 

 parts of 

 water. 



500,000 

 parts of 

 Avater. 



1, 000,000 

 parts of 

 Avatei- 



hour 



Colonies. 



350 



750 



1,250 



925 



Colonies. 



450 



65 



4 







Colonies. 



400 



180 











Colonies. 



1, 050 



1,700 



2 







Colonies. 



22, 000 



1,350 











Colonies. 



2,000 



2,050 



550 







Colonies. 

 1 800 





l!550 



6 hours - 



''OO 



24 hours 















