240 



THE BOOK OF BUTTER 



which was attached to the stirring-rod or agitator ; com- 

 posite sample B with a metal tube which drew very nearly 

 an aliquot portion ; composite sample C rather carelessly 

 with a McKay sampler. The McKay sampler bends 

 fairly easily and soon begins to leak ; therefore, the sam- 

 ples procured with it were taken in the usual rapid way of 

 creamery practice. 



Table XXIX — Summary of Seven Day Composites 



It should be noticed that the readings of the average 

 fat test of the milk are very close. This milk was delivered 

 by sixty patrons. There were 420 daily and sixty com- 

 posite tests made. Potts shows further figures which 

 record results similar to the above. The samples were 

 obtained from sixty-six patrons in the same manner as 

 in the above case, excepting that the experiment con- 

 tinued fourteen instead of seven days. 



Here again the readings of " average fat test of milk " 

 are seemingly very nearly the same. They would all 

 be read 4.00 per cent fat on a milk test-bottle. It might 

 seem that better results would be obtained in a seven-day 



