COOLING, STORING, AND SHIPPING MILK. 13 
The range of air temperature during the test of the cork-insulated 
tank was from 78° to 95° F. and averaged 89.3° F. Two 10-gallon 
cans of warm milk were placed in the tank instead of one, as in 
the foregoing tests. At the end of nine hours the temperatures of 
_ the tank-water and the milk were approximately the same, namely, 
49° KF, Jt will be noted, however, that at no time during the test did 
the temperature of the water rise above that of the milk, and it will 
SU ee 
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tt ae | a 
ei isd Rp aad 
See Ma ag | 
Reh et | Saeed 
us ib i GALVANIZED JRON i+ 
ep Poe oa CONGRE eo [/—4¥~ 
oo Gis ees Srey 
Seeessaaecs > an 
i) iis eid alee 
5 oy 8 ES ca ee 
vc je (A a i Oe 
gael |S fe eee a adie ed og 
r ae ee ie Tara 
8A. ODN PEAS 2:00R/0. S00 PM. 
TIME- HOURS. 
Fig. 10.—Rise in temperature of water during 9 hours in 4 types of cooling tanks. 
All tanks covered and in milk house. 
| be further noted that all the ice was not melted until the end of the 
_ sixth hour. The cork-insulated tank withstood an air temperature 
_ 18.3 degrees higher than the galvanized-iron tank, 9.9 degrees higher 
| than the concrete tank, and 8.2 degrees higher than the wooden tank, 
_ and cooled two cans of milk instead of one to a lower temperature 
| than any of the other tanks. The final temperature of the water in 
| the insulated tank was 9 degrees lower than in the iron tank, 6 degrees 
