EXPERIMENT STATION BULLETINS. 625 



FOREWORD. 



TECHNICAL BULLETIN NO. 33. 



The importance of bovine infectious abortion investigations is con- 

 ceded by everyone interested in animal husbandry. Both practical 

 men and scientists have been seeking assiduously but unsuccessfully for 

 a solution of the problem. It has been suspected for some time that 

 milk and the milk-secreting gland play a very important role in the dis- 

 semination of this disease amongst cattle. Naturally suspicion was 

 aroused concerning infected milk as a food supply for human use. As 

 a part of our attack on the project, "The Effect of Diseases in the Cow 

 on the Milk," Mr. Cooledge has been working for several years on the 

 most urgent phase of this subject and has presented in this paper some 

 of the results of his investigations. We believe that these results throw 

 a powerful light on the fundamentals of the whole subject, removing 

 any cause for alarm in so far as the human problem is concerned and 

 pointing out a safe and hopeful method of attack in so far as the live 

 stock problem is concerned. This research is being continued by Mr. 

 Cooledge and his associates. 



WARD GILTNER. 



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