665 
The general practice of heating milk, which has now become a custom among 
the tenement population of New York, is undoubtedly a large factor in the less- a 
ened infant mortality during the hot months. 
Only the purest milk should be taken raw, especially in summer. 
No discussion of the subject is complete without recognition of the 
debt the world owes Mr. Nathan Straus for his early and persistent 
advocacy of pasteurization and the establishment of his infants’ milk 
depots. Through his influence and philanthropy this movement has 
now spread to many cities of this country and abroad. 
Fig. 64.— Home pasteurizer. (See p. 675.) 
Mr. Emile Berliner, of Washington, has also for many years 
pointed out the dangers in raw milk and taught the wisdom of 
“ scalding ” milk. 
HOME PASTEURIZATION. 
If pasteurization is to be done perhaps the best place to do it is in 
the home, but the heating of milk to just 60 ° and the holding of it 
to just that temperature for twenty minutes, then cooling it rapidly, 
