APRIL 20 1878. IMPROVED DOVETAILING MACHINE. CENTRIFUGAL PUMPING ENGINE. NEW INVESTIGATIONS ON GALLIUM. STENGEL'S DOVETAILING MACHINE. DIRECT-ACTING CENTRIFUGAL PUMPING ENGINE., scientific american, 1878-04-20
APRIL 20 1878. IMPROVED DOVETAILING MACHINE. CENTRIFUGAL PUMPING ENGINE. NEW INVESTIGATIONS ON GALLIUM. STENGEL'S DOVETAILING MACHINE. DIRECT-ACTING CENTRIFUGAL PUMPING ENGINE., scientific american, 1878-04-20
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