Alexander Graham Bell, geboren am 3. März 1847 in Edinburgh, Schottland, und verstorben am 1. August 1922 in Baddeck, Kanada war ein britischer, später US-amerikanischer Audiologe, Erfinder, Großunternehmer und Befürworter der Eugenik. Es gelang ihm 1876, aufbauend auf Ideen seiner Vorgänger, das Telefon zur Marktreife zu entwickeln und ein flächendeckendes Telefonnetz in Nordamerika aufzubauen, das von seinem Unternehmen American Telephone and Telegraph Company monopolartig beherrscht wurde.
Davenport Car Manufactory plaque, on the facade of 710 Main Street, Cambridge, Massachusetts, USA. This building was home to the Davenport Car Manufactory, pioneering manufacturer of railroad cars, as noted in the plaque. According to another plaque below, it was subsequently one end of the first two-way long distance telephone conversation, which extended across three hours on October 9, 1876. Thomas G. Watson was at this location, and spoke to Alexander Graham Bell at 60 Kilby Street, Boston, Massachusetts.
A quote by Alexander Graham Bell engraved in the stone wall within the Peace Chapel of the International Peace Gardens (in Manitoba Canada and North Dakota, USA).
This is a picture that has been colorized by Michael T. Sanders of NTICentral.org. Originally, the photograph was taken in 1899 by Alexander Graham Bell at his School of Vocal Physiology and Mechanics of Speech. In the picture is Helen Keller along with lifelong companion and teacher Anne Sullivan.
In October, 1873, Bell began experiments at 292 Essex Street in Boston using vibrating reeds (R) set in motion by speaking into the mouthpiece or orifice (O). A platinum wire (P) attached to the reed (R) dipped into a cup of liquid -- in this case, mercury (M). the round mouthpiece that Bell spoke into was made of gutta percha (gg). The drawing is in the Library of Congress.
Bells first experiments for improving telegraphy involved a replication and improvement upon on Helmholtzs electrical transmission of musical tones from one vibrating tuning fork to another.
The Brohead-Bell-Morton Mansion (also known as the Levi P. Morton House) located at 1500 Rhode Island Avenue, N.W., in the Logan Circle neighborhood of Washington, D.C. Built in 1879 to the designs of architect John Fraser, (renovated in 1912 by architect John Russell Pope) the Beaux-Arts style building originally served as the private residence of John. T. and Jessie Willis Brodhead. Since 1939, the building has served as offices for the National Paint, Varnish, and Lacquer Association (now known as the National Paint and Coatings Association). Former occupants include Alexander Graham Bell and his wife Mabel Gardiner Hubbard, U.S. Vice President Levi P. Morton, the Embassy of Russia, and U.S. Secretary of State Elihu Root. The building is listed on the National Register of Historic Places and the District of Columbia Inventory of Historic Sites.
P.D. Richards, Bells friend and neighbor, wrote the inventor a letter on November 9, 1874 describing the transmission of telegraphic messages over wires using a liquid transmitter filled with mercury. This is a detail of the drawing included with the 1874 letter, which is in the Library of Congress
Bildquelle: FamousScotts2.jpg Autor: Wikipedia / M.V.E.i. in der Wikipedia auf Englisch (Originaltext: Based on the previous one by M.V.E.i., but inclluding changes proposed by Sicilianmandolin and approved during a discussion.) Lizenz: gemeinfrei
Collage of images representing the en:Scottish people. Up (from left to right): en:James Watt, en:Walter Scott, en:Alexander Graham Bell. Down: en:William Wallace, en:Mary, Queen of Scots, en:Sean Connery.
Plaque comemmorating the event The theme of the Seventh International Sand Sculpture Festival was discoveries. Alexander Graham Bell having the first long distance (and long-winded - three hours! Three minutes would have proved the concept!) phone conversation.
Commemorative plaque on Franklin School, Washington DC. Reads: From the top floor of this building was sent on June 3, 1880 over a beam of light to 1325 L Street the first wireless telephone message in the history of the world.The apparatus used in sending the message was the photophone invented by Alexander Graham Bell, inventor of the telephone.This plaque was placed here by Alexander Graham Bell chapter Telephone Pioneers of America March 3, 1947 the centennial of Dr. Bells birth
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Title: Marian Hubbard Daisy Bell, three-quarter length portrait, at eight years of age, standing, facing left, with dog Abstract/medium: 1 photographic print.
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P.D. Richards, Bells friend and neighbor, wrote the inventor a letter on November 9, 1874 detailing the experiments he had witnessed in which Bell was sending messages over wires using a liquid transmitter filled with mercury. The caption reads: Apparatus constructed by A. Graham Bell during the winter of 1872-3. Drawn from memory (Feb. 1876) by P. D. Richards (a witness of the experiments).
Exhibit in the National Museum of American History, Washington, DC, USA. Photography was permitted in the museum without restriction.
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Dr. Alexander Graham Bell and Cyrus Adler with their aircraft engine test boat and early example of an airboat or hydrofoil, the Ugly Duckling. This picture is taken from a January 1907 issue of National Geographic.
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