it will receive and transmit the music of a piano, cation have revolutionized commerce. Stocks of goods are and even the turning of the music may be heard. Whistling, now telegraphed for, where formerly orders were given by flute music, and othersounds are transmitted with their ship communication.… … has to pay for its gains. Ultimately society, which includes everybody, is benefited by the use of machinery. A century Fig. 4.—MICRO-TELEPHONE USED AS A TELEPHONE. ago an agricultural laborer, or one of the operative class, lived in one or two rooms, with no sanitary comforts, no This instrument,…
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