20 



nous heaters for city milk, and quote from the reply of Dr. 

 Russell: 



"' * * *We are still working on the subject of pas- 

 teurizing at 140, as I think for commercial purposes this is 

 very much preferable to the application of a higher tempera- 

 ture where the viscosity of the milk is so reduced. 

 *It icill necessitate, however, the securing of better class of milk to 

 ~beyin with:' * * * 



"Regarding the question of continuous vs. intermittent 

 pasteurizers, I may say that I have yet to see any device which 

 warranted me in changing my previous opinions in regard to 

 the desirability of continuous pasteurizers for city milk sup- 

 plies. I am aware of the fact that there are a number of 

 continuous pasteurizers upon the market for which more or 

 less extravagant claims are made, but it is a fact that the 

 most energetic of these concerns do not seem to be inclined to 

 submit their apparatus to a strict bacteriological test; they 

 prefer to sell it on the merits of practical demonstrations, as 

 they say. 



"There is no question that from the standpoint of capacity 

 the field is theirs, and, in fact, their type of machine appeals 

 to the man who pasteurizes milk, but I believe we must main- 

 tain the interests of the consumer as well as the producer of 

 pasteurized milk, and I am not willing to commit myself to 

 any continuous machine which it has been possible for me to 

 test. We have subjected one or two of these to a more or 

 less critical examination and find that they do not come within 

 gun shot of their reputed claims. Of course, I do not say that 

 there are none that may not give proper treatment, but we 

 have tried earnestly to have the manufacturers of these ma- 

 chines send us one for close examination, and they have failed 

 to do so." 



And from Dr. E. N. Eaton, of Illinois: 



"# * * A s to the efficiency of continuous pasteurization 

 wt know that the tendency of late has been to decrease time and 

 temperature below former standards. Elaborate experiments by 

 microscopical, bacteriological and inoculation methods have 

 shown that a temperature as low as 140 Fah. for 10 minutes 

 especially in closed vessels will destroy pathogenic bacteria, 



Italics by J. H. Monrad. 



