Americana 1920
The Encyclopedia Americana · 1920 edition
Public Domain Encyclopedia Database
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The Encyclopedia Americana · 1920 edition
Encyclopaedia Britannica · 11th edition
TELEGRAPH (Gr. Tr/Xe, far, and ypafaiv, to write), the name given to an apparatus for the transmission of intelligence to a distance. Etymologically the word implies that the messages are written, but its earliest use was of appliances that depended on visual ...
Vol. 26, pp. 510-540 · ocr-imported-page-aligned... ; LIGHTING: Electric; ELECTROCHEMISTRY and ELECTROMETALLURGY. The principles of telegraphy (land, submarine and wireless) and of telephony are discussed in the articles TELEGRAPH and TELEPHONE, and various electrical instruments are treated in separate article ...
Vol. 9, pp. 179-192 · ocr-imported-page-aligned... nd copyists, packers and shippers, saleswomen (which is the largest class), and telegraph and telephone operators they have a large representation (13 to 34 %). A great variation exists in the proportion of the sexes employed in different manufacturing industr ...
Vol. 27, pp. 612-735 · ocr-imported-page-alignedThe New International Encyclopaedia · First edition