General Daniel Craig McCallum. DUPLEX STEAM PUMPING ENGINES. DUPLEX STEAM PUMPING ElfOrNES. THE CLIPPER INJECTOR. FIG. LONGITUDINAL SECTION OF INJECTOR. is New Inventions., scientific american, 1879-01-18

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General Daniel Craig McCallum. DUPLEX STEAM PUMPING ENGINES. DUPLEX STEAM PUMPING ElfOrNES. THE CLIPPER INJECTOR. FIG. LONGITUDINAL SECTION OF INJECTOR. is New Inventions., scientific american, 1879-01-18

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