COOLING AND AERATION 43 
As might be expected, by forcing the ice water from 
the cooler back into the ice water storage, a considerable 
saving is effected, not only of ice and water, but of time 
as well. Proof of these advantages is brought out by the 
results recorded in the following table, which shows the 
work of the cooler with and without the ice water pump. 
When no pump was used, ordinary well water was 
sprayed over finely crushed ice in the can shown at the 
right, and the discharge was allowed to run into the 
drain. 
Taste SHowrnc Work or Cooter WItH AND WrtHout THE 
Pump. 
Tempera- 
Tempera- 
Amount Time in cuure a ture of 
Number of Experiment. |Ice Used—| Cooling— fore Cool. | Well Wa- 
Pounds. | Minutes. ing—De- ter—De- 
grees F, | 8tees F. 
With pump.-----_. 37 45 8 3 
No. 1 
tas pump..... 89 92 88 73 
With pump..-.-_---. 35 40 8 66 
No. 2 
Without pump--..- 94 82 84 66 
With pump... 2 32 35 82 64 
No. 3 
Without pump..... 85 93 8 64 
With pump..--...... 38 45 88 72 
No. 4 
ae pump..... 95 8 85 72 
With pump..-----. 34 43 85 70 
No. 
Without pump...--- 83 88 88 70 
5 With pump....--.. 35 41 85 69 
Average 
Po aeuioat piiap ass: 89 88 86 69 
