tered the field. A Philadelphia inventor, Mar- well as a direct method of quantitatively analyzing gas EDISON PHONOGRAPH-RECORDER. cus Ruthenburg, comes to the fore with a new magnetic is the invention of C. C. Tutweiler, of Philadelphia, Pa. separator for ore. In the machines hitherto con- His… … causing the belt or apron on which the ore flows and STREET GAS ANALYZER on which the magnetic particles are collected to move BALL BEARING THILL-IRON. together, Mr. Knight believes that he obviates these provided with three-way valves located at the top and objections. bolt has its inner end…
Nernst · Patents · Incandescent · Air · Lamp · Nernst lamp · Scientific American · Compressed air · River bridge · Nernst lamps · Incandescent lamps · Horse power · East river · Rain gage · Rapid transit
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