Hiscox, Gardner Dexter, 1822?-1908 · New York, The Norman W. Henley publishing co. · leaf 176
AIR POWER APPLIANCES. Windmills, Bellows, Blowers, Air Compressors, Compressed Air Tools,Motors, Air Water Lifts, Blowpipes, Etc. 6x2. ANEROID BAROMETER.—A pair of corrugateddiscs are put togetherto form a sealed vac-uum chamber. Thelower disc is fixedto the barometerframe, while the otherdisc is…
Mechanical movements
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
