TESTIMONY OF ELWYN WALLER. 131 



day of the trial, in the practical tests that were made, you took, I be- 

 lieve? A. I did. 



Q. And did you test them ? A. I did, that evening. 



Q. And did you find that at the 100 point they agreed ? A. I 

 found that they did agree at that point. 



Q. Did you find that they agreed at any other point ? A. I 

 found that they agreed, I think it was at the 88 point, at the 78 point 

 and at the 68 point, essentially agreed. I have a note here on the 

 subject. 



Q. Look at your notes, and refresh your memory if it is neces- 

 sary, and tell me at what points they agree ? A. At the 104 point 

 they all agree, at the 88 point three were 88 and one was 87 ; at the 

 78 point two were 78, one was 77 and one was 76 ; at the 68 point 

 two were 68, one was 67, and one was 66. 



Q. You have, in addition to the prosecution of studies in 

 milk, been into the country and tested the milk from cows when 

 milked ? A. I have tested it with the lactometer. 



Q. Will you state the result, and the number of experiments you 

 made ? A. I made 86 tests upon the milk which I saw taken 

 from the cows myself, and the highest of those was 122, 1 think ; it 

 was either 120 or 122 ; the lowest was 102, the average I do not 

 recollect now absolutely, but it was a little below 110. 



Q. The lactometer which you used, was what ? A. It was the 

 lactometer constructed for the Board of Health, with the 100 mark 

 at 1.029. 



Q. And the temperature was what ? A. The temperature when 

 I tested them was 60 Fahr. 



By the COURT Q. All the milk you tested had a greater specific 

 gravity than 100 ? A. Yes, sir. 



By Mr. PRENTICE Q. Now, you have had practical experience 

 in these several tests ; have used the lactometer and have used the 

 analysis ; in your opinion is it necessary when milk at 60 Fahr. 

 falls below the 100th point on the lactometer of a standard of 1.029 

 to use analysis to detect the adulteration by water alone. A. 

 In case it were very near 100, 98 or 99, I should prefer to make 

 an analysis before deciding whether the milk had been watered or 

 not, but in ordinary cases if it fell much below 100 I should not 

 consider analysis necessary. 



