MUNN & COMPANY Editors and Proprietors PUBLISHED WEEKLY AT NO. 37 PARK ROW (PARE BUILDING) NEW YORE. O. D. MUNN. S. H. WALES A. E. BEACH. g'' The New York News Company' 8 Spruce street. Egr' A. Asher & Co. 20 Unter den Linden Berlin are Agents for the Ger man States. 188 Fleet street London are the Agents to receive European subscriptions oe promptly attended to. Contents: (Illustrated articles are marked with an asterisk.) 'Improvement in Machine for Mak- The Hydrogen Gas Theory 151 The Great Polish Salt Mines 145 A Report on Ordnance 151 Coal or Sun 146 'Improved Device for Converting
MUNN & COMPANY Editors and Proprietors PUBLISHED WEEKLY AT NO. 37 PARK ROW (PARE BUILDING) NEW YORE. O. D. MUNN. S. H. WALES A. E. BEACH. g'' The New York News Company' 8 Spruce street. Egr' A. Asher & Co. 20 Unter den Linden Berlin are Agents for the Ger man States. 188 Fleet street London are the Agents to receive European subscriptions oe promptly attended to. Contents: (Illustrated articles are marked with an asterisk.) 'Improvement in Machine for Mak- The Hydrogen Gas Theory 151 The Great Polish Salt Mines 145 A Report on Ordnance 151 Coal or Sun 146 'Improved Device for Converting Tobacco Pipes 146 a Wheeled Vehicle into a Watch Glasses—How they are Improvement in Portable Made—A Look at the Mannfac- Discoveries in the North Sea 152 tory—The Different Transmutation of Metals 152 'Waste' and 'Economy of Patent Office Contract swindle . 152 A N atural Mechanic 146 Communication between the Gas from Gasoline more Danger 'Ware 154 ous than Coal Gas 150 Applications Before Congress for The Crank and Rotary 151New Publications 156 The Blue Color of the Skies 154 tents 156 Poisonous Odors 151 Inventions Patented in England by Extinguishing Kerosene Lamps. 151 Americans 157 Power Required is as the Square of List of Patents 157 Velocity 151 TRIALS AND TRIUMPHS OF INVENTORS. THE DARIEN SHIP CANALWATER COMMUNICATION BETWEEN THE ATLANTIC AND PACIFIC. COLORING OF MARBLE AND OTHER BUILDING STONES A NEW PROCESS. AMP. HORTICULTURAL PROTECTION., scientific american, 1869-03-06
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