METHODS OF SAMPLING MILK 



25 



by the mixture of daily samples. This method has 

 been proved to be as accurate as that of testing each 

 sample daily by itself, but there are several precau- 

 tions to be observed carefully in applying this method 

 in commercial practice. 



The conditions that are necessary for success in 

 using the method of composite sampling may be con- 

 sidered under the following heads: (i) Systematic 



FIG. 1 

 COMPOSITE-SAMPLE JAR 



FIG. J 

 COMPOSITE-SAMPLE JAR 



preparation, (2) methods of taking daily samples, (3) 

 use of preservatives, (4) care of composite samples, 

 (5) ^S^ of composite samples, and (6) preparation of 

 composite samples for sampling and testing. 



Systematic preparation for taking composite sam- 

 ples. — A round glass jar or bottle, holding a pint or 

 quart, should be provided for each patron. The forms 

 given in Figs, i and 2 are suitable, or ordinary Alason 



