Cork insulation; a complete illustrated textbook on cork insulation ...

I
CORKBOARD ICE CREAM CABINET 387
is indicative of the success that attended his efforts in the
new industry in the Middle West. From then on there was a
steady growth in this branch of the dairy industry, but rapid
expansion did not begin until the shortage of natural ice in
1890 gave the art of ice making and refrigeration the impetus
necessary to establish that industry on a successful commercial
basis. Then great improvements in machinery, and methods
of ice cream manufacture, were rapidly introduced during
FIG. 182.—CORKBOARD INSULATED LONG-DISTANCE REFRIGERATED
ICE CREAM TRUCK.
the next two decades, until by the end of 1912 there was a
reported total output of 154 million gallons of ice cream valued
at 160 million dollars.
The National Association of Ice Cream Manufacturers was
organized in 1906, to more effectively promote the interests of
ice cream manufacturers by assisting the industry to develop
along permanent, substantial lines, through standardization of
factory operations, pure food laws, and so forth. Trade asso-
ciations and trade papers did much to promote the welfare of
the industry, by teaching a common-sense code of ethics and
by acting as a clearing house for its numerous activities. Many
schools and colleges took up the teaching of the principles