192 Milk and Its Products 
in the work done by the different machines of the 
same style and manufacture. This variation is due 
to slight peculiarities in the construction of the in- 
dividual bowls, and which cannot be detected by 
the ordinary senses, and only appear upon an ex- 
amination of the skimmed milk after actual use. 
These differences are well illustrated in a series of 
trials made in different factories,* and shown in 
detail in the following tables: 
ALEXANDRA JUMBO 
Rated capacity, 2,000 pounds per hour 
Pounds Average Pounds 
No. of Average| Range |speed of | Range sepa- | Per cent 
Date. | of milk |temper-| of bowl, of rated | of fat in 
fac- | in whole| ature. |temper-| revolu-| speed. per [skimmed 
tory. run. ature. {tions per hour. | milk. 
minute. y 
Aug. 19. 7 3,809 70 66-75 7,200 |7,000-7,400) 1,344 25 
ie | 8 =——- 70 68-72 6,985 |6,800-7,200] 1,170 15 
20.) 8 2 70 68-72 6,585 |6,300-6,900) 1,611 -20 
aw 2h 9 5,928 75 72-81 6,900 |6,600-7,100} 1,882 -20,¢ 
23.) 11 4,052 84 80-86 6,600 |6,200-7,400] 1,814 -33 
Average}. .|. ty TA |. «ws| 6854 | oa ess] 1,564 23 
DE LAVAL, ALPHA NO. 1 
Rated capacity, 2,500 pounds per hour 
July 17. 3 2,519 80 78-85 5,520 |4,800-6,100) 2,606 -08 
Aug. 18. 6 3,629 74 73-76 5,806 |5,700-6,000) 2,592 05 
Sep. 16.| 17 1,187 72 | 71-73 5,933 |5,800-6,000) 2,456 -08 
20.) 22 4,627 82 80-83 | 6,071 |5,800-6,200) 2,501 04 
“ 21.) 23 6,376 78 77-80 6,044 |6,000-6,200) 2,500 03 
Oct. 4. 24 5,588 82 78-85 5,844 |5,600-6,000) 2,747 -13 
“ 4.) 25 1,802 86 85-90 | 6,280 |6,000-6,400| 2,040 03 
Average|.  .|. ee. 79 |. ...| 5928 |..... | 2,491 -06. 
* Cornell University Agricultural Experiment Station, Bulletin No. 105. 
