Composite Samples of Milk. 165 



sition in 1893, in which tests this method was adopted 

 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. Accuracy of the described methods of sam- 

 pling. An experiment made at the Wisconsin Dairy 

 School may here be cited, showing that concordant re- 

 sults will be obtained by the use of the drip sampling 

 method and the Scovell tube. Two composite samples 

 were taken from fifty different lots of milk, amounting 

 to about 6,000 Ibs. in the aggregate. One sample was 

 taken of the drip from a hole in the conductor spout 

 through which the milk passed from the weighing can; 

 the other was taken from the weighing can by means 

 of a Scovell sampling tube. The following percentages 

 of fat were found in each of these samples : 2 



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

 Professor G. L. McKay, formerly 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 turning the handles at right angles the 



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. 1S07. 



2 See also 199 et sea. 



