TESTIMONY OF CHAELES F. CHANDLER. 61 



point is the 100th mark, and that is determined with great accuracy 

 on those four lactometers that I used yesterday. 



Q. Then, Dr. Chandler, do I understand you correctly that the 

 100 mark is the only point at which this lactometer is correct ? A. 

 I would not say it is the only point at which it is absolutely cor- 

 rect ; I can tell by referring to my notes if you will allow me to do so. 



Q. Will you designate any other point except the 100 mark at 

 which the lactometer is absoluely correct. A. 88 on that lactometer 

 is correct; 104 on that lactometer is correct ; 100 on that lactometer 

 is correct. 



Q. Any others ? A. I think 68 was absolutely correct ; there 

 are five points on that lactometer which unless my memory fails 

 me are absolutely correct ; it was tested at five points. 



Q. Now as to all the four lactometers we examined yesterday, is 

 each one of those correct at all the points you designate ? A. I 

 think there are one or two points at which one of them was not cor- 

 rect ; they were all correct at the 100th point and at 104. 



Q. Then why, sir, did they all disagree at 114 and figures above ? 

 A. Because it is not necessary in constructing such fragile instru- 

 ments of that kind to make the unimportant portions of the scale 

 absolutely accurate ; it would make them something like twice as 

 expensive, and we have difficulty enough in getting money to pay 

 for these from the City Treasurer ; it is a simple question of ex- 

 pense in the cost of the lactometer whether every mark upon it shall 

 be absolutely correct. 



Q. How much do those cost at retail ? A. I think we pay a 

 dollar apiece. 



Q. Don't you know that the lactometers used by the milkmen 

 cost three dollars ? A. If they choose to have a thermometer in- 

 serted in the lactometer they increase the expense. 



Q. Do you use an inferior instrument ? A. No, sir ; I tested 

 one of your instruments and it was inaccurate at the 100 mark. 



Q. "What do you mean by my lactometer ? A. The one you 

 handed to Dr. Waller yesterday. 



Q. Now, Dr. Chandler, aside from the fact that out of 120 de- 

 grees on your instrument you can only designate five which are 

 absolutely correct, can you state any other mechanical defect in 

 this instrument, or are there any ? A. I am not aware of any. 



