COOLING, STORING, AND SHIPPING MILK. 5 
The average temperature of all samples of milk taken before the 
educational work was 62° F. and the average after the educational 
work was 54° F., or a drop of 8 degrees. The average bacterial 
count before was 27,000,000 per cubic centimeter, while after the in- 
struction was given it was only 750,000 per cubic centimeter. In 18 
of the poorest dairies the average bacterial count was 63,000,000 per 
cubic centimeter before and 2,600,000 after. The a pietante be- 
fore instruction was given was 63° F. while the temperature after 
was 56° F. Fifty-one of the best dairies had an initial count of 15,- 
370,000 per cubic centimeter while after the demonstration the count 
CHART NO./ AVERAGE OF ALL CAIRIES 
f MULLIONS BACTERIA PER CC, 
uy 5 20 3O 35 
cnoeeeneooeee ae RESCESCORREaD hima | = = = 
4 iS 2 oo Rac, 
SOU en a TEP] 
UM S GIVEN. et 
ciamimpmmmmmmneal (IIT TIT 
AVERAGE TEMPERATURE OF MILK BEFORE ASSISTANCE WAS GIVEN 62°F. 
“ AFTER ” ” SHO 
DECREASE IN TEMPERATURE &°F 
CHART NO. 2 — AVERAGE OF /8 OF THE WORST DAIRIES- 
ail Tina Trent rit 
TANCE WAS GIVEN, 2600 0O 
INITIAL NOM iiigiiiil nit i ity NCE WAS G 
ave ER 
way 
DA Fh ee os ea mt PRS 7 RE se a 
‘DECREASE "Go aoc ooo ra: 73 c= 
AVERAGE TEMPERATURE OF MILLK BEFORE ASSISTA NGE wa Ss ria icles SS F 
Pes ” ” " AFTER ” 
DECREASE IN TEMPERATURE 7°F. 
Ni CHART [Vo. TTT OF 5S! OF THE BEST DAIRIES- 
onenR SReneeseean ua ] 
aguuuccnagyshU NOGsUNGOUMRMLOLLUIGE 
iin 
ees ih TENTITTA(TTV TTT} it 
AVERAGE TEMPERATURE OF 7K BEFORE ASSIS TANGE WAS Sense oe = 
AFT. 
DECREASE IN: TEMPERATURE 70 °F. 
‘Fig. 2.—Showing improvement in milk supply of 102 New England dairies after as- 
sistance by U. S. Departure of Agriculture, 
was reduced to 170,000 per cubic centimeter, a decrease of 15,200,000 
per cubic centimeter. This decrease was due largely to the preven- 
tion of multiplication of bacteria because the milk was kept at a 
lower temperature. These examples serve to illustrate how im- 
portant prompt cooling on the farm is in keeping down the bacterial 
count of market milk. 
COOLING EFFICIENCY OF VARIOUS KINDS OF TANKS. 
In order to cool and hold milk at low temperatures on the average 
farm a properly constructed cooling tank is necessary. In fact most 
