128 



A New Dairy Industry. 



same percentage of nourishing ingredients whenever 

 it may be analyzed by a chemist. 



ANALYSIS. 

 Human Normal Milk, Normal Milk, 



3.0 

 0.6 



4.8 

 0.7 



To exclude all possibility of pollution by bacteria 



floating in the air of the 

 laboratory (the mixing or 

 the sterilizing localities) a 

 disinfection of these prem- 

 ises should periodically be 

 instituted. The safest and 

 simplest way is by apply- 

 ing the fumes of formic 

 aldehyd, a gas which kills 

 all floating bacteria *or 

 germs. The lamp by which 

 these fumes are generated 

 is shown at Fig. 21. The 

 vessel is filled with methyl 

 covered by a cap made of 

 After lighting the \vick and 

 waiting to see the.platina netting become red hot, the 

 flames is blown out when the glowing of the wire 



Fig. 21-DISiNFECTING LAMP. 



alcohol and the wick 

 platina wire netting. 



