114 MASS. EXPERIMENT STATION BULLETIN 186. 



Sampling Feeds and Milk. — The hays were sampled at the beginning, 

 middle and end of each half of the trial by taking forkfuls of the daily 

 weighings, running same through a power cutter, sub-sampling and placing 

 the laboratory samples in large glass-stoppered bottles; these bottles prop- 

 erly labeled were brought to the laboratory immediately. The grains 

 were sampled daily by placing definite amounts in glass-stoppered bot- 

 tles, properly labeled, and brought to the laboratory at the end of each 

 half of the trial. Dry matter determinations were made and samples pre- 

 pared for complete analysis. The milk was sampled for five consecutive 

 days in each week, preserved with formalin, and the composite analyzed 

 for total solids and for fat by the Babcock method, and for nitrogen. The 

 method of sampling consisted in mixing the milk as soon as drawn with 

 the aid of a perforated tin disk attached to the end of a stout tin handle, 

 by moving the same up and down gently for a number of times, and then 

 taking out a definite amount with a small long-handled tin dipper. 



