CREAMERY PROBLEMS. AI 
TABLE. 10. 
Labor Cost of Separating with Hand Separator the Milk Yielded 
by Twenty Cows for One Year. 


ie iS ans 
2 es way ST Omae 
a= a O Tae O15 
as - hw 
: a5 og Oe yt! aes 
STYLE OF SEPARATOR. a ot yk UsSy SBUEE 
Ore os om Avg 
v a uso Sula 
Dn A, Yo ee C500 
4 DB \3es gO 4 
ee eka eele BS 


Ay - - - - 300 | $70.00 333 $49.95 
B, 5 : : r : é b - | 400 85.00 250 3 75O 
‘s. - - - . - - - - 500 | 100.00 200 30.00 
a 2 = - - - - 700°) 125.00 |.143 21.45 
- - - - - . - - 1200 | 200.00 83 12:43 


of 20 cows this saving in one year would amount to $7.95 when 
butter fat is valued at 28 cents per pound. The saving effected 
by reason of the capacity of the separator (Table 10) would 
amount to $37.52. 7 | 
TESTING SKIM MILK SAMPLES. 
In the ordinarytoperation of the Babcock milk tester a small 
amount of fat is not brought into the neck of the bottle. ‘This 
slight loss of the smallest fat globules is compensated for in 
the testing of whole milk by reading from the bottom. to the 
extreme top of the fat column. When readings of whole milk 
tests are made in this way, the results of the Babcock tester 
agree with gravimetric analyses. 
In testing skim milk the same amount of residual fat is not 
recovered, and the reading of tests of skim milk or butter milk 
are usually too low. It has been suggested that in testing skim 
milk an excess of acid be used and that the samples be run at 
full speed for six minutes. 
In Table 11 are given the average results of duplicate analyses 
of ten samples of skim milk and the average of duplicate 
Babcock tests of the same. sample. The readings were from 
the Wagner double neck bottle graduated to hundredths of 
one per cent. The average gravimetric analyses of the ten 
samples was fourteen-hundredths of one per cent. The average 
of the same samples with the Babcock test, when 17.6 cc. of 
acid was used, was four-hundredths per cent. When 25 cc. 
was used the Babcock readings were six-hundredths per cent. 
