can be ex-actly duplicated, isthe sup-ply. Over 800 are now in dallyuse,and the demand is increas-ing. Personsof ordinary intel-ligence can set them up andrun them. They are the mosteconomical engines ever in-vented. One common scuttletof coal will yield one horsev power per day of lOhours: oth-Ier…
Patents · Munn · Iron · Feet · Scientific American · Improved · Iron working · Inch american · Professor mayer · Square feet · Cast Iron · Sewing machine · Ten times · Carbolic acid · Address munn
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