342 CuHEMicaL TEsSts AND ANALYSES 
densed milk to contain 40 per cent sucrose when the milk has been 
condensed sufficiently to contain 32 per cent milk solids? 
AMswers eo2-7 40S. PonseeSe a 1S: 
To every 100 pounds of fluid milk must be added 15 pounds 
of sugar, 
To 15,000 pounds fluid milk must be added 
2250 pounds of sucrose. 
CHAPTER XXX. 
CHEMICAL TESTS AND ANALYSES OF MILK, SWEET- 
ENED CONDENSED MILK, EVAPORATED MILK 
AND MILK POWDERS. 
In assembling these methods of analyses, preference has 
been given the “Official and Provisional Methods of Analysis,” 
published by the American Association of Official \gricultural 
Chemists.!. The official methods have been modihed and supple- 
mented by other methods in numerous cases wherever, in the 
judgment of the writer and others, such modifications and sub- 
stitutions are better adapted for analysis of these special prod- 
ucts. A special effort has further been made to include in this 
chapter modifications and abbreviations of tests and analyses, 
adapted for the use of the factory operator, whose knowledge, 
skill, facilities and time are too lmited to enable him to sticcess- 
fully follow the directions of the official methods, or to execute 
delicate and difficult chemical analyses. 
For practical factory tests of fresh milk on the receiving 
platform, determining its fitness for condensing, the reader is 
referred to Chapter IT, “Inspection of Milk at the Condensery.” 
MILK. 
Specific Gravity. 
Aerometric Method by Means of the Quevenne Lactometer. 
-~-Use an accurate Quevenne lactometer with thermometer at- 
tachment and a lactometer cylinder about ten inches high and 
1 United States Department of Agriculture, Bureau of Chemistry, Bulletin 
No, 107, 1912. Also Journal of the Assn. of Official Agr. Chemists, Vol. II, 
No. 3, Novy. 15, 1916. 
