PREFACE IX 



SO far as I believe it to be a very serious mistake to 

 trust wholly to the destruction of germs in milk, rather 

 than to aim at a germless, clean supply, needing 

 no such treatment. I am, above all else, an adhe- 

 rent of what is called "The Clean Milk School." Still, 

 under existing conditions, I am (as indeed I have al- 

 ways been) an advocate of pasteurization as a pre- 

 cautionary measure. Pasteurization is a makeshift, 

 not a solution of the problem, but I do not despise 

 the makeshift on that account. In my earlier work 

 I desired to lay special emphasis upon the desirability 

 and the possibility of securing a safe and wholesome 

 milk supply for all our cities, and I am grateful for 

 the many assurances that have come to me of the fact 

 that the volume in question contributed in some de- 

 gree to the direction of public attention to that very 

 important matter. I desire to state, however, that 

 in my own family pasteurization has been practised, 

 simply because I could not consent to the exposure 

 of my children to the perils of raw milk as they are 

 described in the following pages. 



As far as possible, I have acknowledged my indebted- 

 ness to other writers, either in the text itself or at the 

 end of the book. I wish it were possible for me to like- 

 wise acknowledge my indebtedness to all who have so 

 kindly assisted me, but that is out of the question. 

 Nearly a thousand correspondents, mostly physicians 

 and veterinarians, have given me the benefit of their 



