44 MARKET DAIRYING 
All the milk was cooled to 45° F., and the amount of 
milk cooled in each experiment was forty-four gallons, 
one-half of which was cooled with a pump and the other 
half without. 
The above figures show that less than half the amount 
of ice and less than half as much time were required 
in cooling with the pump than when no pump was used. 
Where no ice is intended to be used, coolers may be 
purchased without the ice water section. 
GPRING WATER 
DISCHARGE {9 | (cme 
| is 
SPRING WATER 
SUPPLY 
# ICE WATER 
RETURN 
| ICE WATER 
Gaze SUPPLY 
Fig. 6.—Tubular Cooler. 
The cooler is fastened by means of two-inch gal- 
vanized iron gas pipes, the lower ends of which are em- 
bedded in the concrete floor while the upper ends are at- 
