Scientific American, [AuGusT 2, 1890. … how La prepare the welitiae pad, and ais She ani:ine ink 4. « ‘s ss ss sb - 210 ELECTRICITY, LIGHT AND HEAT. by Which the copies ure wade; how to apply the written letter to the pad: how tu take ait cupies of the letter. Other sizes at low prices. Before you buy get our prices. —A lecture by Prof.…
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