[MARCH 30 1872. 214 0 1 1 Earth Boring Anger. MELENDY'S DOOR FASTENER. SILZ'S EARTH BORING AUGER. Prizes for Chemical Inventions. alb BEACH'S SPIRAL SPRING SCROLL SAWING MACHINE., scientific american, 1872-03-30
[MARCH 30 1872. 214 0 1 1 Earth Boring Anger. MELENDY'S DOOR FASTENER. SILZ'S EARTH BORING AUGER. Prizes for Chemical Inventions. alb BEACH'S SPIRAL SPRING SCROLL SAWING MACHINE., scientific american, 1872-03-30
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