40 STORRS AGRICULTURAL EXPERIMENT STATION. 
the ordinary operator. ‘Taking the tests as read, however, the 
thirteen samples of Cooley Creamer skim milk averaged 0.27 
per cent. fat, and the thirty-six samples of separator skim milk 
averaged 0.056 per cent. fat. The Cooley cream tested 18.3 
per cent. fat, and the separator cream 23.1 per cent. fat. The 
average number of cows in the herd when separators were used 
was ten. 
TABLE 9. 
Comparison of Hand Separator and Cooley Creamer. Loss of 
Fat in Skim Milk for One Year when Cows average 
5,000 Pounds of Milk Each. 



Testof| Lbs. of | Value 

Lbs. of | Skim fatin | of fat 
No. oF Cows. Skim | Milk. Skim | at 28c. 
Milk. % | Milk. | perIb. 
puma eee So) tS s @! | | 
Cooley Creamer— 
Bee ec nee bo) Ae, Sea ee Se Omid Se ener 55.14 $15.44 
10, . Z E : - - - 40,850 | 9.27.) 110720) aes 
20, . 2 r - Z a - |  81,100.1..27 220.507) ee eee 
AGW re chs : : : > = | 103,400") 127 944i dom 123.53 
Hand Separator— | | 
‘ ‘ : : 2 Z 1752254 -1050 he 0 405 


CO ie $2.70 
10, - - - - - - - 34,450 | .056 19.30 5.40 
20, > = ? : 3 : z 68,900 | .056 20 °cour 10.80 
4o, - ! - = - - vit 13 7; 500; 4. 2050 a lam CRASS 

On the basis of the above calculation, the hand separator, 
compared with the Cooley Creamer, effects a saving of $25.48 
in one year with a herd of ten cows; $50.96 with a herd of 
twenty cows; and $1ro1.92 with a herd of forty cows. 
One of the most important factors in the selection of a sepa- 
rator is a consideration of the capacity of the machine. Styles 
of separators ranging in capacity from 300 to 1,200 pounds per 
hour may be purchased at from $70.00 to $200.00. With a 
herd of 20 cows, yielding 5,000 pounds each, the time required 
to separate the milk would vary from 333 hours with the 
smaller machine, to 83 hours with the larger. At 15 cents per 
hour the cost would vary from $49.95 to $12.45. - 
The separator making the most favorable showing in Table 
8 would effect a saving over the style of separator making the 
least favorable showing of .038 per cent. of fat. With a herd 
