A REMARKABLE OIL COMPANY. THE GREAT GAS WELL OF PENNSYLVANIA. A Bewitched Telegraph Wire. AMENDING THE PATENT LAW. SOME ELECTRICAL MEASUREMENTS OF ONE OF MR. EDISON'S HORSESHOE LAMPS. THE STEVENS INSTITUTE OF TECHNOLOGY. --1 The Philadelphia Wool Exhibition. Heavy Patent Damages. Progress In Walking Matches., scientific american, 1880-05-01
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