COOLING, STORING, AND SHIPPING MILK. 9 
four tests. Table 1 shows the B. t. u. absorbed under the different 
conditions: 
TABLE 1.—B. t. u. absorbed by water and tanks under different conditions. 
Outdoors. Indoors. 
Type of tank. 
Uncovered.| Covered. | Uncovered.| Covered. 
Bot. B.t. u. 1836 hy We IBGE Us 
Grallvamniize dh om errs a as aot Nite ras 24, 200 15, 950 15, 400 12,100 
COMOTHIDS Cosdebosedeneusosntesouandeqsdootendeanesacdce 19, 800 12, 650 11, 550 8, 800 
NA CoXer a hs Se A Se aS ge Oe 15, 400 5, 500 7, 150 4,400 
TAS Ua Tee i le iss I IRN COUGH NI )eti Loan) UR oy Sau 11, 550 1, 650 4, 400 1,100 
Table 2 shows the relative loss of efficiency in cooling tanks of dif- 
ferent construction compared with the insulated tank. 
Taste 2.—Relative loss of efficiency in cooling tanks of different construction, 
based on the insulated tank as unity. 
Outdoors. Indoors. 
Type of tank. 
Uncovered.| Covered. | Uncovered.| Covered. 
GA VANI ZAR OTB Ee ete ge are tet sinnte er ape (een ener dye Delt 9.7 3.5 11 
COTA CHE LOM ee at eer spares expan ey LE ale spats oe Ladle apie ilo? Tol 2.6 8 
NAY DOG Less Be FS ay UN SS OSL A I aan a OO nL A ay SUL i583 3h3 1.6 4 
J IVa YS DI rreye LEN SRI eee ci BS NT A Uy a a ee 1 1 1 1 
The relative loss of cooling effect in tanks of different construc- 
tion expressed in pounds of ice is shown in Table 8. This table also 
emphasizes the range of loss in cooling effect through radiation from 
cooling tanks during hot weather. 
TABLE 3.—Relative loss in cooling effect in tanks of different construction ez- 
pressed in pounds of ice. 
Outdoors. Indoors. 
Type of tank. 
Uncovered.| Covered. | Uncovered.| Covered. 
Ff : Pounds. Pounds. Pounds. Pounds. 
GalyamiZzediirormyss Meese toe iye iy ene LC EI aR ke) ia EES 168 111 107 84.0 
COIN CTE COPA ee ee sree I ont tee Ny PREY RPA YS 137 88 80 61.0 — 
WAV Se Bes IL Ee a A AOD AS A AOU Oe cnn aa 107 38 50 30.5 
sASTTTAbE dear se ras nose NCO SLUR ER CEI OE 80 12 30 7.6 
The galvanized-iron tank, without a cover and exposed to the 
direct rays of the sun, lost 168 pounds of ice compared with 7.6 
pounds of ice for the cork-insulated tank covered and sheltered, or a 
difference of 160.4 pounds of ice. A loss of this amount of ice each 
day for 150 days would amount to approximately 24 tons for the 
season. At that rate, in 150 days the loss of ice, estimated at 15 
81238°—Bull. 744192 
