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Scientific American, Vol. 89, No. 21 (November 1903) (1903)
leaf 10
e letter clined, and form abutments for steam passing through to be placed inside. As the door is closed the letter AN IMPROVED CONSTRUCTION FOR COHERERS. inclined ports in the ends of the piston. In operation receives an impression which tells the number and The coherer which is herewith… … been invented by Thomas J. Johnson, of special machinery. A STEAM-PRESSED PACKING RING. © 1903 SCIENTIFIC AMERICAN, INCCamphor · Patents · Power · Feet · Scientific scientific · Scientific American · Toxic diseases · Sandy hook · American american · Crude rubber · Horse power · Trolley companies · Illustrated catalogue · Hay fever
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