LYSOL AS A DISINFECTANT. 
617 
2. i per cent, solution. 5 minutes, o; 10 minutes, o; 20 
minutes, o; control, 659. 48 hours’ growth. 
3. 1 per cent, solution. Immediate, 2 ; 5 minutes, 2 ; 10 
minutes, o ; control, countless. 48 hours’ growth. 
Series III. 
1. 2 per cent, solution. 1 cc. aureus culture grown 48 
hours in bouillion, placed in solution, 10 minutes, o; 15 min¬ 
utes, o; 20 minutes, o; control, 256. 72 hours’ growth. 
2. 2 per cent, solution. Immediate, 5; 5 minutes, o; 10 
minutes, o; control, countless. 48 hours’ growth. 
3. 2 per cent, solution. Immediate, o; 5 minutes, o; 10 
minutes, o; control, countless. 72 hours’ growth. 
4. 2 per cent, solution. Immediate, o; 5 minutes, 1; 10 
minutes, o ; 20 minutes, o; no control. 72 hours’ growth. 
5. 2 per cent, solution. 10 minutes, o; 15 minutes, o; 20 
minutes, o; control, 256. 48 hours’ growth. 
Series IV. 
1. 3 per cent, solution. 1 cc. aureus culture grown 48 
lours in bouillion, placed in solution. 5 minutes, o ; 10 min- 
ites, o; 15 minutes, o; control, countless. 48 hours’ growth. 
2. 3 per cent, solution. Immediate, o; 5 minutes, o; 10 
ninutes, o; control, countless. 48 hours’ growth. 
Thus we see that between a and 1 per cent, solution, there 
s but little difference in results. In the whole a \ per cent, 
lolution is in many cases of sufficient strength to destroy a 
najority of the germs. A 1 per cent, solution is but a very 
ittle more vigorous in its action. 
The action of a 2 per cent, solution is positive in every 
;ase save two ; one immediate plate having five colonies, and 
>ne 10 minutes plate having one colony. Four 3 per cent, so- 
utions gave complete action every time; all growth being 
lestroyed even on the plates made immediately. 
As a 3 per cent, solution was found to be of sufficient 
strength to overcome all resistance, no stronger solutions 
yvere used. 
A few experiments were made upon the bacillus subtilis, 
