TESTIMONY OF JOSEPH T. o'CONNOB. 157 



sir ; we were there together ; I would pick out certain cows, and he 

 would be off in another direction. 



Q. How largely does the milk of a cow ordinarily differ in 

 specific gravity between morning and evening ? A. That I am 

 unable to say ; I have made some observations, but I am unable to 

 adduce results ; I have made some readings and from these readings 

 I am unable to deduce results. 



Q. There is a very considerable difference often, is there not ? 

 A. So it is stated. 



Q. Is it not so from your own knowledge ? A. I tell you that I 

 have seen such discordant results on that point, such a difference be-, 

 tween morning milk and night milk on the one hand, and vice versa, 

 that I am unable to say that there is any specific general difference. 



Q. In making a test of milk in this city, do you inquire first of 

 dealers when using the lactometer whether it is morning's or even- 

 ing's milk ? A. I do not. 



Q. Is there not a considerable difference in gravity between the 

 first half of the milk that comes, from the cow, and the last half ? 

 A. Yes, sir ; so it is stated. 



Q. Is it not a fact? A. It is a fact. 



Q. Can you state about what difference that generally is or state 

 within what limits it consists ? A. I would not like to limit upon 

 any such thing as that, the first and the second portion of milk ; it 

 would be impossible for me to give an answer to that question. 



Q. Would you say a difference of ten degrees? A. I would not 

 mention any number of degrees. 



Q. In these examinations made by you of cattle in the country 

 did you determine that they were healthy cattle ? A. I did not 

 determine that they were healthy cattle. 



Q. "What did you determine about that ? A. Simply that they 

 were healthy from external appearances to a man who is not a 

 veterinary surgeon apparently healthy, good-looking animals, as ani- 

 mals go. 



Q. I suppose that is as far as they need be examined ? A. I 

 have nothing to say about that. 



Q. Did you hear- the testimony of Professor Silliman yesterday ? 

 A. I am not sure that I heard all of it; I know I heard part of it. 

 Q. Did you hear his testimony to the effect that the gravities of 



