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The Marconigram for August 1904. Published by Munroe & Munroe, managers Marconi Underwriting Syndicate, New York, Boston & Montreal. Published monthly. Features articles on Peter Cooper Hewitt, inventor of the Mercury Lamp; "Telephoning on a Beam of Light," feature on Charles Proteus Steinmetz; "Making Diamonds in the Electric Furnace," "Feeding the Soil," "Telegraphy with Conductors."