HINTS TO CORRESPONDENTS. INDEX OF INVENTIONS For which Letters Patent of the United States were Granted JUNE 8 1897 AND EACH BEARING THAT DATE. Cavertissernents. ORDINARY RATES Inside Page each insertion cents a line Buck Page. each insertion ) a line AND SUPPLIES. CATALOGUE FREE THE HALL BRASS PIPE WRENCH. CUTTING-OFF MACHINES Both Hand and Power. Water. Gas and Steam Fit ters' Tools Hinged Pipe Vises THE ARMSTRONG MFG. CO. Bridgeport Conn. UEEN ' ARCHITECT LEVEL $50 Improved Transits & Levels Graduated entirely on our large dividing engines. Spe cial award at the World's Fair. All
HINTS TO CORRESPONDENTS. INDEX OF INVENTIONS For which Letters Patent of the United States were Granted JUNE 8 1897 AND EACH BEARING THAT DATE. Cavertissernents. ORDINARY RATES Inside Page each insertion cents a line Buck Page. each insertion ) a line AND SUPPLIES. CATALOGUE FREE THE HALL BRASS PIPE WRENCH. CUTTING-OFF MACHINES Both Hand and Power. Water. Gas and Steam Fit ters' Tools Hinged Pipe Vises THE ARMSTRONG MFG. CO. Bridgeport Conn. UEEN ' ARCHITECT LEVEL $50 Improved Transits & Levels Graduated entirely on our large dividing engines. Spe cial award at the World's Fair. All kinds of Engineer Instruments and Materials. 220 p. illustrated catalogue mailed free only if this ad. is mentioned. loll Chestnut St. Philadelphia. Eyelet Machines. MONTGOMERY &CO. 106 Fulton Street New York City. FootandRandPowerrOacRifierg =MCA FALLS MPG. COMPANY. GATES ROCK ORE BREAKER Steam Ore Stamp Mining Machinery GATES IRON WORKS Dept. C 650 Elston Ave. Chicago. BARNES' UPRIGHT DRILLS W. F. & JOHN BARNES CO. 1999 Ruby Street ROCKFORD ILL. Drop Forging Plants for BICYCLE work. The Billings & Spencer Co. PLATED of Special Wireworking Mach inery. BLAKE & JOHNSON. 'It ge CellsgellboutCools, scientific american, 1897-06-19
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