the portable engine of Hoard Bradford, of "Water-town, N. Y., and is something like the one of CharlesMann,ofTroy, N.T. Portable steam engines, we know, interest a large class of our readers ...
These early steam engines produced a vacuum to ... idea in 1765 to include a separate condenser making the engine more powerful, portable and efficient. This clip is from the series The Genius ...
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