Composite Samples of Milk. 



163 



for sampling the milk produced by the single cows and 

 the different herds. 1 The data obtained in these breed 

 tests also furnish abundant proof of the accuracy of the 

 Babcock test. 



186. d. The McKay sampler (fig. 53), constructed by 

 Professor G-. L. McKay, of Iowa experiment station, 



consists of two nickel-plated brass 



tubes that telescope one within the 



other; both have a milled slot so 



made that when 



the handles stand 



together the slot 



is open: by turn- 

 ing the handles 



at right angles 



the slot is closed. 



The sampler is 



made in two 



lengths, 21 and 



18 inches, and 



has been found 



very convenient 



for sampling 

 either milk or cream. 



i86a. e. Michels' cream-sampling 

 tube. Pig. 54 shows a section through 

 a modified Scovell sampler in a tin 

 heater recently invented by Prof. 

 John Michels of North Carolina agricultural college. 



1 Kentucky experiment station, 8th report, pp. xxx-xxxi. Another 

 form of a milk sampling tube in use at the Iowa experiment station was 

 described and illustrated by Mr. Eckles in Breeder's Gazette, May 19, 

 1897. 



FIG. 53. The McKay 

 sampler. 



FIG. 54. Michels' 



cream sampling 



tube. 



