86 BACTERIOLOGY. 



which such a solution is to be made should be fresh 

 and of good quality. Good chlorinated lime, as pur- 

 chased in the shops, should contain not less than 25 to 

 30 per cent, of available chlorine. The materials to be 

 disinfected in either of the lime solutions should remain 

 in them for about two hours. The solutions should be 

 freshly prepared when needed, as they raj^idly decom- 

 pose upon standing. 



An antiseptic is a body which, by its presence, pre- 

 vents the growth of bacteria without of necessity killing 

 them. A body may be an antiseptic without possessing 

 disinfecting properties to any very high degree, but a 

 disinfectant is always an antiseptic as well. 



A germicide is a body possessing the property of 

 killing bacteria. 



