88 TESTIMONY OF GEORGE C. CALDWELL. 



and' state whether it does not contain three instead of two instances 

 of milk below 1.029? A. I find one 27 and one 28.9 ; yes, I see 

 there are three, but I read the resume on the opposite page where 

 only two are given ; it is very likely a misprint in a table as it is not 

 in the resume". 



Q. Do you mean to say that there is nothing contained in the 

 extracts which I read from this book, the milk analysis of Dr. "Wank- 

 lyn, which refutes or is at variance with your opinion as to the lacto- 

 meter as a test for showing the adulteration of milk by water ? A. I 

 do ; the author speaks of the lactometer without the use of the 

 other senses. 



Q. Do you cause the milk arriving in this city to be tested and 

 examined at the railroad stations and seized if impure ? 



(Objected to ; objection sustained ; exception.) 



GEORGE C. CALDWELL, sworn and examined by Mr. Prentice, testified 

 as follows : 



Q. Dr. Caldwell, you are a chemist by profession ? A. I am, sir. 



Q. Please state your study and experience in that profession ? 

 A. I began the study of chemistry about 20 years ago, at Harvard 

 University, took the degree there, went to Germany, and spent a 

 year and a half at Goettingen in the study of chemistry, and took 

 the degree of doctor of philosophy there ; went to Heidelberg in 

 Germany, and spent another year in the study of chemistry, and 

 since my return to this country have been engaged in teaching 

 chemistry part of the time ; a short time at Columbia College, and 

 a short time at Antioch College in Ohio, as Professor of Chemistry, 

 and at the Agricultural College of Pennsylvania, and at Cornell 

 University, where I now am. 



Q. What is your chair there ? A. Professor of Agricultural and 

 Analytical Chemistry. 



Q. Have you made a special study of dairy products and of 

 milk ? A. I have made some special study of that subject. 



Q. The lactometer is of the kind of instruments called hydro- 

 meter? A. It is. 



Q. And theie are similar instruments used for like purposes in 

 other substances than milk ? A. There are. 



