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Alexander Graham Bell

The story of the invention of the telephone - and its effect on our lives/The telephone/Alexander Graham Bell/Hogyan született meg a telefon - a hírközlés történetének egyik legnagyobb találmánya, napjaink elmaradhatatlan kelléke

Alexander Graham Bell
Alexander Graham Bell Alexander Graham Bell Alexander Graham Bell
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'Michael Pollard: Alexander Graham Bell ' összes példány
Kiadó: Exley Publications Ltd.
Kiadás helye: Watford
Kiadás éve:
Kötés típusa: Fűzött kemény papírkötés
Oldalszám: 64 oldal
Sorozatcím: Scientists who have changed the world
Kötetszám:
Nyelv: Angol  
Méret: 22 cm x 15 cm
ISBN: 1-85015-200-4
Megjegyzés: Fekete-fehér és színes fotókkal, illusztrációkkal.
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Fülszöveg


Scientists who have changed the world
When Alexander Graham Bell discovered the telephone in 1876 he started an explosion in humán communication that is still going on to this day. Before Bell's discovery, the quiekest way of getting a message to someone was by tapping it in Morse code down a telegraph wire. But even with the telegraph there was no way you could send the humán voice by wire. Before the telegraph, itself relatively new, urgent messages had had to go by horse, by smoke signal, by pigeon or by ship.
A lot of people were working on ways to improve the telegraph in the 1870s, but Bell was uniquely positioned to make the breakthrough. As a young man he had dedicated his life to helping deaf people, and was trying to make extra money by worlung out how to improve the telegraph. During his experiments, he heard a voice vibration down a short piece of wire, which he had stretched from one room to another. Had any of the other inventors heard the same tiny nőise, they... Tovább

Fülszöveg


Scientists who have changed the world
When Alexander Graham Bell discovered the telephone in 1876 he started an explosion in humán communication that is still going on to this day. Before Bell's discovery, the quiekest way of getting a message to someone was by tapping it in Morse code down a telegraph wire. But even with the telegraph there was no way you could send the humán voice by wire. Before the telegraph, itself relatively new, urgent messages had had to go by horse, by smoke signal, by pigeon or by ship.
A lot of people were working on ways to improve the telegraph in the 1870s, but Bell was uniquely positioned to make the breakthrough. As a young man he had dedicated his life to helping deaf people, and was trying to make extra money by worlung out how to improve the telegraph. During his experiments, he heard a voice vibration down a short piece of wire, which he had stretched from one room to another. Had any of the other inventors heard the same tiny nőise, they would almost certainly not have understood the immense significance. Bell, with his detailed knowledge of how the humán ear amplifies vibration, saw immediately that it should be possible to send the humán voice down a wire. The telephone was born. Within a decade it had spread across America, and soon thereafter the world. Vissza

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Témakörök

Michael Pollard

Michael Pollard műveinek az Antikvarium.hu-n kapható vagy előjegyezhető listáját itt tekintheti meg: Michael Pollard könyvek, művek
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