260 



CLEAN MILK 



To secure saturation of the atmosphere the incubator should 

 Le made with a shallow depression over the whole bottom surface,, 

 which may be "kept filled with water, or in default of this a large- 

 shallow pan of water may be kept on one of the lower shelves. 



COUNTING. 



Expression of Result. — Since minor differences in milk counts- 

 are within the working error of the methods and are of no signifi- 

 cance in practice, the following scale has been adopted for recording- 

 results of market milk examinations : 



Counts below 100,000 are distinguished by ten thousands. 



Counts between 100,000 and 500,000 are distinguished by fifty 

 -thousands. 



Counts between 500,000 and 1,000,000 are distinguished by- 

 hundred thousands. 



Counts between 1,000,000 and 2,000,000 are distinguished by- 

 two hundred thousands. 



Counts between 2,000,000 and 5,000,000 are distinguished by; 

 five hundred thousands. 



Counts above 5,000,000 are distinguished by millions. 



Therefore only the following figures are used in reporting: 



