Sternberg, The Evening Traveler, September 1, 1880, The Alexander Graham Bell Papers at the Library of Congress Thompson, Silvanus. 218-222, issn, doi :.1049/sqj.1966.0040. 1874 Transit of Venus Commission, for his new 'L' Street laboratory in Washington, at the rate of15 per week. Allessandra Lolita Oswaldo, gelitirip tüm kente yaymaya çalt telefondan baka bir ey dünmeyen, sevgilisinin bitmez tükenmek bilmeyen deneylerinden rahatsz olmaya balaynca Belli terk etti. Bu aygtn ileyii, kule tepesine taklm hareketli kollarn kullanlmasyla oluturulan iaretler yardmyla rakam ve harfleri iletmeye dayanyordu. 30 The German Siemens Halske Company boosted the photophone's range by utilizing current-modulated carbon arc lamps which provided a useful range of approximately 8 kilometres (5.0 mi). However at the time of their February 1880 breakthrough, Bell was immensely proud of the achievement, to the point that he wanted to name his new second daughter "Photophone which was subtly discouraged by his wife Mabel Bell (they instead chose "Marian with "Daisy". "Professor ell on Selenium and the Photophone". 13, 1881, *Moser,. 56, New York, February 1881, pps.181-182. Bu ksa ad "ALO" idi. "The Radiophone pamphlet distributed at Louisiana Purchase Exhibition, St Louis, Missouri, 1904. Under the action of the voice the mirror becomes alternately convex and concave and thus alternately scatters and condenses the light.
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