inside Page each insertion . 75 cents a line. Back Page each insertion . $1.00 a line. Randolph's New Ditcher. Jarvis Gas Consuming Furnace. Steel Castings 239 BROADWAY NEW YORK. VERTICAL SCIENTIFIC GRAIN A. W. STRAUB & CO. 2231 Wood St. Philadelphia Pa. PORTLAND CEMENT PHOTOGRAPHY MADE EASY NEWTON'S EMULSION for DRY PLATES. SCOVILL MANUFACTURING CO. Publishers J.E.BUERKP.O. Box 979 Boston.Mass B. K. BLISS & SONS NEW STANDARD FLOURING MILLS. EDWARD HARRISON No. 135 Howard Ave. - New Haven Conn. MACHINISTS' TOOLS. NEW HAVEN MAN IJFACTVIEING CO. New Haven Conn. The HOAGLEY PORTABLE STEAM ENGINE

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inside Page each insertion . 75 cents a line. Back Page each insertion . $1.00 a line. Randolph's New Ditcher. Jarvis Gas Consuming Furnace. Steel Castings 239 BROADWAY NEW YORK. VERTICAL SCIENTIFIC GRAIN A. W. STRAUB & CO. 2231 Wood St. Philadelphia Pa. PORTLAND CEMENT PHOTOGRAPHY MADE EASY NEWTON'S EMULSION for DRY PLATES. SCOVILL MANUFACTURING CO. Publishers J.E.BUERKP.O. Box 979 Boston.Mass B. K. BLISS & SONS NEW STANDARD FLOURING MILLS. EDWARD HARRISON No. 135 Howard Ave. - New Haven Conn. MACHINISTS' TOOLS. NEW HAVEN MAN IJFACTVIEING CO. New Haven Conn. The HOAGLEY PORTABLE STEAM ENGINE
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inside Page each insertion . 75 cents a line. Back Page each insertion . $1.00 a line. Randolph's New Ditcher. Jarvis Gas Consuming Furnace. Steel Castings 239 BROADWAY NEW YORK. VERTICAL SCIENTIFIC GRAIN A. W. STRAUB & CO. 2231 Wood St. Philadelphia Pa. PORTLAND CEMENT PHOTOGRAPHY MADE EASY NEWTON'S EMULSION for DRY PLATES. SCOVILL MANUFACTURING CO. Publishers J.E.BUERKP.O. Box 979 Boston.Mass B. K. BLISS & SONS NEW STANDARD _FLOURING MILLS. EDWARD HARRISON No. 135 Howard Ave. - New Haven Conn. MACHINISTS' TOOLS. NEW HAVEN MAN IJFACTVIEING CO. New Haven Conn. The HOAGLEY PORTABLE STEAM ENGINE. TheJ.C.HOMILEY CO. LAWRENCE MASS. PATENTS AT AUCTION. BOILER FEEDERS IN EXISTENCE. NATHAN & DREYFUS NEW YORK. Also Patent Oilers and Lubricators. ROCK DRILLING MACHINES Mill Stones and Corn Mills. CAMERON Steam Pumps For Mines Blast Furnaces Rolling Mills Oil Refineries Boiler Feeders &c. Works Foot East 23d St. New York. PORTABLE QUARTZ MILL. GOLD AND SILVER MILL 9 J. C. TODD 10 Barclay St. New York or Paterson N. J. AYER & SON'S MANUAL MUNN & CO. 37 Park Row New York. WOOD ENGRAVING FURNITURE FACTORY FOR SALE AT Prices Greatly Reduced. James Leffel es C H. W. JOHNS MANUFACTURING COMPANY 87 Malden Lane New York. ADVERTISER PATENTS SOLD. LOLD ROLLED SHAFTING. STEAM PUMPS. MACHINISTS' TOOLS NILES TOOL WORKS Hamilton Ohio. THE The Most Popular Scientific Paper in the World. THIRTY-THIRD YEAR. 52 Numbers a Year. FAIL T MONEY THE TANITE CO. EMERY WHEELS AND GRINDERS. ARTIFICIAL LIGHT. JOSEPH C. TODD SEND STAMP FOR ILLUSTRATED CIRCULAR. Please say where you saw this. The PICTET ARTIFICIAL ICE C, scientific american, 1878-03-30

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