PHYSICAL AND CHEMICAL EXAMINATION OF MILK 



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standards are prepared as follows: One gram of pulverized cow 

 manure is suspended in a liter of filtered or distilled water and 



Fig. 78. — Sediment in milk before and after separating. The left column 

 shows sediment from a pint sample of whole milk. The center shows that 

 there is no sediment in newly separated cream from the same milk, and the 

 right shows the test for the skimmed milk. This test was made at the fac- 

 tory. (Wisconsin Circular No. 41.) 



definite quantities of this suspension passed through the cotton 

 pledgets so as to leave the following amounts of cow manure: ^ 

 milligram, 1 mgr., 2 mgrs., and so on to 10 mgrs. 



Fig 79. — Open-top pails catch dirt. The larger the open top, the more 

 dirt it catches. (Wisconsin Circular No. 41.) 



A simple apparatus for testing the sediment in milk has been 

 devised by Tonney. A Gooch crucible is fastened in the mouth 



