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Johnson, L. R., 1858-

No biographical history available for this identity.

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Johnson, Alba B. (Alba Boardman), 1858-1935

http://n2t.net/ark:/99166/w6br9055 (person)

Oliver Evans (1755-1819) was perhaps the most talented of Philadelphia's early 19th century mechanicians. He produced two major innovations, the automated flour mill and the high-pressure, non-condensing steam engine, and experimented with or anticipated others, including four-cycle mechanical refrigeration, central heating, the steam wagon, the machine gun, and a perpetual baking oven. Evans was born in Newport, Del., on September 13, 1755. Little is known of his early ...

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