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

*i chanical
! constantly,
I
j
I lished,*
[. Hull,
CORKBOARD INSULATED REFRIGERATOR 343
Prior to 1923 20,000
Year 1923 25,000
Year 1924 50,000
Year 1925 100,000
Year 1926 500,000
Estimated 1927 750,000
At present the subject of household refrigeration is receiv-
ing the attention of many inventors and engineers, as well as
FIG. 160.—TYPICAL AIR-COOLED HOUSEHOLD REFRIGERATI.NG MACHINE.
of several hundred manufacturers. New and improved medevices
and processes are being de\eloped almost
several editions of a <strong>complete</strong> treatise on "the
principles, types, construction, and operation of both ice and
mechanically cooled domestic refrigerators, and the use of
ice and refrigeration in the home." having already been pub-
under the title of "Household Refrigeration," by H. B.
Refrigeration Engineer.
Mr. Hull, in introducing his subject, says that, "mechan-
ical household refrigeration is having an important influence
on refrigerator cabinet construction ; it is necessary to have
better constructed and insulated refrigerators to operate satis-
factorily, with the lower food-compartment temperatures pro-
duced by the mechanical unit" ; and Mr. Hull drew extensively
on his experience as a refrigeration and research engineer,
and in turn upon the work and experience of many others in
allied industries, in setting forth his conclusions with respect
*.\ickerson & Collins Co., Publishers, 5707 West Lake Street, Chicago, Illinois.