578 
The  Copper  Treatment  of  Water. 
/Am.  Jour.  Pharm. 
X  December,  1904. 
clave  at  1 10  degrees  for  thirty  minutes.  After  adding  the  cultures 
the  water  was  kept  at  a  temperature  of  35 °  to  370  C,  and  plates 
were  made  at  the  end  of  four,  eight,  twenty-four  and  forty-eight 
hours,  respectively.  The  plates  were  maintained  at  the  same  tem- 
perature and  the  organisms  counted  at  the  end  of  two  days  in  the 
case  of  B.  coli  and  of  five  days  in  the  case  of  B.  typhosus.  The  re- 
sults are  given  in  the  following  tables  : 
TABLE  I.— EXPERIMENTS  WITH  Bacillus  coli. 
Plates  made  at  time  of  ad- 
ding culture  .      .  . 
Plates  made  at  end  of  four 
hours   
Plates  made  at  end  of  eight 
hours  ... 
Plates  made  at  end  of  twen- 
ty-four hours  
Plates  made  at  end  of  forty- 
Water  without  Copper 
Foil. 
Water  with  Copper  Foil. 
Triple 
Distilled 
Water. 
Filtered 
Tap 
Water. 
Tap 
Water. 
7,746 
11,246 
8,283 
7.655 
5,075 
7,665 
7,735 
3,H5 
7,000 
1,000,000 
1,000,000 
1,500,000 
1,200,000 
1,600.000 
2,000,000 
Triple 
Distilled 
Water. 
8,S66 
Filtered 
Water. 
Tap 
Water. 
6,790 
4,410 
No  No  No 
Organisms  Organisms  Organisms 
TABLE  II. —EXPERIMENTS  WITH  Bacillus  typhosus. 
Water  without  Cop- 
per Foil. 
Water  with  Copper 
Foil. 
Triple 
Distilled 
Water. 
Tap 
Water. 
Triple 
Distilled 
Water. 
Filtered 
Water. 
Tap  Water. 
Plates  made  at  time  of 
adding  culture    .  . 
Plates   made    at  end 
of  four  hours    .  . 
Plates  made    at  end 
of  eight  hours 
Plates    made  at  end 
of  twenty-four  hours 
Plates  made    at  end 
of  forty-eight  hours  . 
3.740 
2  835 
3,850 
3,750 
3,315 
3.675 
3,815 
i,995 
i,435 
i,540 
3,986 
No  Organisms 
127 
No  Organisms 
1,400 
No  Organism* 
From  the  experiments  thus  far  conducted  the  following  conclusions 
may  be  drawn  : 
(1)  The  intestinal  bacteria,  like  colon  and  typhoid,  are  completely 
destroyed  by  placing  clear  copper  foil  in  the  water  containing 
them. 
(2)  The  effects  of  colloidal  copper  and  copper  sulphate  in  the 
