AGRICULTURAL EXPERIMENT STATION, 



After adopting the test, the factory and its patrons must agree 

 upon some method of paying for the milk. There are two or three 

 ways of doing this. One is to adopt a standard, say 3.5 per cent, 

 fat, 9 per cent, other solids and fix a price for milk of this 

 standard. Then pay for milk, testing above or below these figures, 

 more or less in proportion as it tests. Another method is to fix 

 the price per pound for fat and other solids, and determine by 

 the test the number of pounds furnished by each patron. Still 

 another is to fix the price per pound for total solids. Total solids 

 are found by adding the percentage of fat to the percentage of 

 solids found by the table. 



Some doubtless will complain that these tests involve too much 

 labor to be practical, but in regard to this we will say, that 

 after one has had some practice, the time required to make the 

 tests is much less than one would suppose. A man can easily test 

 20 samples in two hours for both fat and other solids. The fat 

 test takes the greater part of the time, and that need not be 

 made more than once a week, especially if the composite sample 

 mentioned in "notes on cream testing" be used. 



All lactometer readings must be taken before the milk sours. 

 Quite a number of formulas have been made for estimating solids 

 not fat from the specific gravity and the per cent, of fat, but 

 the table here given is made from one presented by Dr. Babcock, 

 Bulletin No. 31 Wis. Agr. Experiment Station. 



The writer has made quite a large number of comparisons in 

 determining solids by this table and by the gravity process, and 

 finds the agreement close enough for practical purposes. 



The results can be found on the following pages. The table for 

 solids not fat is so arranged, that it can be taken from the bulletin 

 and mounted on card board for use. 



The apparatus for these tests can be obtained from most dealers 

 in dairy supplies. jThe Quevenne lactometer should always be 

 ordered to use with the table given. 



