[Illustration]




SCIENTIFIC AMERICAN SUPPLEMENT NO. 288




NEW YORK, JULY 9, 1881

Scientific American Supplement. Vol. XI, No. 288.

Scientific American established 1845

Scientific American Supplement, $5 a year.

Scientific American and Supplement, $7 a year.


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TABLE OF CONTENTS.

I. ENGINEERING AND MECHANICS--Dry Air Refrigerating Machine.
5 figures. Plan, elevation, and diagrams of a new English
dry air refrigerator

Thomas' Improved Steam Wheel. 1 figure