RECENT INVENTIONS. Improved Grease Trap. Improvement in Railway Cars. New Saw Tooth Swage. Novel Picture Exhibitor. Improved Sleigh. Transparent Blower for Fireplace. Portable Head Rest. Improved Spirit Level. Railway Weather Signals., scientific american, 1883-07-28
RECENT INVENTIONS. Improved Grease Trap. Improvement in Railway Cars. New Saw Tooth Swage. Novel Picture Exhibitor. Improved Sleigh. Transparent Blower for Fireplace. Portable Head Rest. Improved Spirit Level. Railway Weather Signals., scientific american, 1883-07-28
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