x DISINFECTION WITH CHLORINE AND AMMONIA 131 



(6) Chlorine. 



(1) An apparatus similar to the one just described may 

 be fixed up, as shown in 



diagram (Fig. 15). 



(2) Allow the chlorine 

 to pass over one of the 

 strips of cloth for half an 

 hour to one hour. 



(3) Then remove it, 

 and place it in a broth 

 tube to be kept at 3 8 '5 C. 



Examine it for 

 growth from day 

 to day as before. 



(c) Ammonia. 



FIG. 16. I, Flask containing, a, mixture of 

 sal-ammoniac (one part by weight) and 

 quicklime (two parts by weight); 5, a 

 layer of powdered quicklime ; the flask 

 with its contents is heated over a Bunsen 

 flame ; II, Wide glass tube containing 

 the infected strip ; III, Flask containing 

 water to receive the ammonia. 



(1) Fix up an apparatus as shown in the accompanying 

 diagram (Fig. 16). 



(2) Allow the ammonia to pass over one of the strips of 

 cloth for half an hour to one hour, and proceed as before. 



Examine the broth tube for growth from day to day. 



