TESTIMONY ON ELWYN WALLER. 133 



Q. Does the Board of Health cause the milk to be tested at the 

 depot ? 



(Objected to ; objection sustained ; exception.) 



Q. Now, what is the most accurate method of determining the 

 adulteration of milk by water ? A. The lactometer. 



Q. Then that is more accurate than analysis, is it ? A. I think 

 it is. 



Q. But you stated just now that by analysis you always found 

 more water in milk than the lactometer indicated, did you not ? A. 

 I did. 



Q. Then if you consider the lactometrical test the best why was 

 it that you subsequently verified that by analysis ? A. Because I 

 desired to find out by two different and independent methods the 

 amount of adulteration. 



Q. Then you found the most adulteration by what you deemed 

 the least accurate method of analysis did you not ? 



(Objected to ; objection overruled.) 



Q. Will the lactometer show you the percentage of water milk 

 contains to a certainty? A. Do you mean the per cent, of that 

 which it naturally contains ? 



Q. Naturally and properly together ; if you take a sample of 

 milk pure or adulterated does the lactometer show you accurately 

 how much water it contains ? A. It will not under those circum- 

 stances. 



Q. Will it show you accurately how much water is contained in 

 the specimen of pure milk ? A. It will not. 



Q. Will not analysis ? A. Analysis will. 



By MB. PRENTICE Q. Will you read the test of the lactometer 

 handed you by the learned counsel the other evening for a test at the 

 point at which it agreed and disagreed with the other lactometer ? 

 A. Where it should have stood at 104 it stood at 105 ; one degree 

 higher ; at' 88 it was one degree too low ; it was 87 ; at 78 it was 

 correct ; at 68 it was one degree too high ; it was 69. 



Q. How did you make the determination ? A. By taking a salt 

 solution, the gravity of which was determined by means of the 

 specific gravity bottle, and then by calculating from the specific 

 gravity, thus determined, what the degree of the lactometer should 

 have been, and then testing the lactometer in the solution. 



