TESTING 337 



sions from to 100 equal 29 divisions on the Quevenne. 

 Therefore, one division on the Board of Health equals 

 0.29 of a division on the Quevenne. To convert Board of 

 Health reading to Quevenne, multiply by 0.29 and to 

 convert Quevenne to Board of Health, divide by 0.29. 

 The correction for temperatures above or below 60 F. 

 is made the same as with the Quevenne, except 0.3 is 

 added or subtracted from the reading instead of 0.1 as 

 with the Quevenne. 



319. Calculating the solids not fat in the milk. When 

 the lactometer reading and fat-content of the milk are 

 known, there are several formulas for calculating the 

 solids not fat. In the following formulas, L equals Que- 

 venne lactometer reading at 60 F., and F equals the 

 percentage of fat in the milk : 



3.8 

 L + F 



= S.N.F. 



y + 0.2 F + 0.14 = S.N.F. 

 4 



320. Testing cheese for moisture. 1 There are two 

 methods of testing cheese for moisture. The following 

 is a simple test devised by H. C. Troy : 



The ordinary butter moisture test, in which a metal 

 cup is heated over a flame, cannot be used for determining 

 the percentage of water in cheese because the high tem- 

 perature developed in operating that test drives from 



1 Sammis, J. L., The moisture test in the cheese factory, 

 Wis. Exp. Sta. Circ. 81, 1917. 



Troy, H. C., A cheese moisture test, N. Y. (Cornell) Exp. 

 Sta. Ext. Bui. 17, 1917. 



