ORDINARY RATES. Inside Page each insertion. - 75 cents a line Back Page each insertion - a line BARNES' UPRIGHT DRILLS ANGLE INDICATOR J. Stevens Arms & Tool Co. Chicopee Falls Foot and Rand Power Macninerg SENECA FALLS MFG. COMPANY. HIGH GRADE en MACHINERY Single Machines or Com plete Equipments for Any Class of Work. J. A. FAY & CO. 10-30 John St. CINCINNATI OHI manufacturers' models the Pratt 6. Whitney Co. hartford Conn. burn° Patent Scarf Fast The SKINNER PAT. SKINNER CHUCK CO. Church St. New Britain Conn 1 1004 1007 1012 1014 1015 016 22 1083 1084. 1085 1086 04 24 32


ORDINARY RATES. Inside Page each insertion. - 75 cents a line Back Page each insertion - a line BARNES' UPRIGHT DRILLS ANGLE INDICATOR J. Stevens Arms & Tool Co. Chicopee Falls Foot and Rand Power Macninerg SENECA FALLS MFG. COMPANY. HIGH GRADE en MACHINERY Single Machines or Com plete Equipments for Any Class of Work. J. A. FAY & CO. 10-30 John St. CINCINNATI OHI manufacturers' models the Pratt 6. Whitney Co. hartford Conn. burn° Patent Scarf Fast The SKINNER PAT. SKINNER CHUCK CO. Church St. New Britain Conn 1 1004 1007 1012 1014 1015 016 22 1083 1084. 1085 1086 04 24 32 Oster Pat. Adjustable Stocks & Dies THE OSTER MFG. CO. Cleveland Ohi Acetylene Gas Lighting NIAGARA FALLS ACETYLENE GAS MACHINE CO. Niagara FaUs N. Y. and Canada. TO INVENTORS. INDEX OF INVENTIONS For which Letters Patent of the United States were Granted DECEMBER 6 1898 AND EACH BEARING THAT DATE. LEARN BY MAIL. ENGINEERING THE UNITED CORRESPONDENCE SCHOOLS F. W. Ewald Gen. Mgr. 156 Fifth Avenue New York WALWORTH PIPE VISES RENEWABLE STEEL JAWS. 20 OLIVER STREET BOSTON MASS. Queen Transits and Levels High Grade Instruments with the Latest Improvements. Optical and Scientific META 1:24LLINERY THICKNE330CMERVISIZE&SHAPE las. DORMAN'S VULCANIZERS are used all over the world. THE J. F. W. BORMAN CO. 121 E. Fayette St Baltimore. Md. U. S. A. TRANSITS AND LEVELING INSTRUMENTS. Every Cool for Every Use NICKEL 105 Fulton Street New York. We have seen some piston rods so badly scored and so much out of line that a third of the power of the engine or pump was lost. We used 'Daniel's Patent P. P. P. Diagonal Rod Pack ing.' It filled the scoring on account of its pliability and enameled the rod sur face until it was smooth as a glass bottle. Then the trouble stopped. Hundreds of the biggest steam users in the country won't have anything else. QUAKER CITY RUBBER CO. GET THE RIGHT ANGLE, scientific american, 1898-12-17


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