erimental work almost indispensable to the architect and builder, RADIOPHONY.—BY ALEXANDER And to persons about to build fur themselves they will Graham Bell. a lecture delivered in the Sibley College find the. work suggestive andgmost useful. They contain course. Contained in SOIENTIFIC AMERICAN… … sufficient power to actuate a sewing machine. Witb 11 a copy, have only to ask for it, and it will be mailed Manufacturers of everything needed for engravings. ‘Contained in SCIENTIFIC AMERICAN SAV TAN AM AN AN. - Ke An A to them. Address, SUPPLEMENT, No. 759. Price 10 cents. To be had at ARTESIAN…
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