TESTIMONY OF ELWYN WALLER. 239 



The COURT I do not think it is admissible ; I do not suppose 

 water is very injurious ; a person who thinks he is going to buy milk 

 does not want to buy water. 



Mr. LAWRENCE There are certain witnesses whom we expect 

 here who are not here now, and I am forced to rest the case for the 

 defence. 



Rebutting testimony : 



ELWYN WALLER recalled by Mr. PRENTICE : 



Q. Dr. "Waller, did you write the article on hydrometer in 

 Johnson's Encyclopedia ? A. I did. 



Q. Will you look at this instrument [instrument shown to the 

 witness] ; that is the lactometer graduated at 1.029, the standard of 

 the Board of Health, is it ? A. Yes, sir. 



Q. Is there any mechanical error in its construction ? A. None 

 that I can see. 



Q. How much difference ought there to be in the size of the 

 degrees ? A. The degrees at the upper end should be there is no 

 apparent difference here but the degrees should be about one- 

 550th part of an inch longer than the degrees at this the lower end 

 of the scale. 



Q. How much would be the difference of the size of one degree 

 from that next to it ? A. Since there are 100 degrees, the difference 

 between the size of one degree and its next neighbor should be 

 the one 55000th part of an inch. 



Q. Ought the lactometer to look like the alcoholometer? A. 

 No, it should not ; if it looked like the alcoholometer I should con- 

 sider it incorrect ; I believe that experiment would carry out that 

 view. 



Q. If you could distinguish any difference in the size of degrees 

 with the eye would you consider it accurate ? A. I should not. 



Q. Did you visit the farm of Mr. Mulf ord in Orange County ? A. 

 Yes, sir ; I did, last Saturday ; I visited his farm and saw the cows 

 milked in the evening that is all the cows which he milked ; there 

 were only four that evening; those he called his regular milkers; 

 there were some which he called strippers. 



