INSTRUMENT FOR OBTAINING LENGTHS' AND BEVELS OF RAFTERS. CONLEE'S INSTRUMENT FOR OBTAINING LENGTHS AND BEVELS OF RAFTERS. ORE CONCENTRATOR. RAILWAY TRACK SYSTEM. I RIVETING TOOL. STEVENS' RIVETING TOOL. Aluminum Tin. CHANNELL'S ORE CONCENTRATOR. NOONAN'S RAILWAY TRACK SYSTEM., scientific american, 1886-10-16
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