^04 CLEAN MILK 



Harrington (Practical Hygiene, p. in) says: "A normal 

 specific gravity with a low percentage of fat will indicate skimming- 

 and watering; low specific gravity with normal or low fat, water- 

 ing ; and high specific gravity and low fat, skimming. Low specific 

 gravity with a high fat will indicate unusual richness; thus cream 

 has a very low specific gravity, due to its preponderance of fat. 

 As a test of the accuracy of this process of examination, the author 

 caused to be analyzed under his supervision 1,714 specimens, which 

 appeared by those tests to be of good quality, and of this number 

 but eight were found to have deviated materially from the statute 

 requirements of 13% of total solids." 



In case inspection by lactoscope and lactometer showed a 

 specimen of milk below the legal requirements, this result should 

 be corroborated by the exact methods of the laboratory before it 

 would be wise to institute legal proceedings. 



If examination of milk with both lactometer and lactoscope 

 shows that the milk tests within normal limits by both instruments, 

 then the milk cannot be much skimmed and watered, as it is of 

 normal richness. Some considerable experience is needed in the 

 reading of the lactoscope. As a matter of fact, in this city (Seattle) 

 and many others the inspector of milk only collects samples and 

 takes temperatures of milk, the testing being done more accurately 

 in the laboratory. 



Selected Forms Used in the Milk Inspection Service of- * 



APPLICATION FOR PERMIT TO SEND OR BRING MILK INTO 



To the Health Officer, 



Sir: In compliance with "An act to regulate the sale of milk in 



and for other purposes," I hereby make application for a permit to send or 

 bring milk into said from the premises described below, located 



{Whole milk 

 Skim milk 

 Cream. 



* Forms are those used in the District of Columbia. 



