Name: First principles of natural philosophy (1897) (en Inglés)
SKU: 56556361
Price: 460.03 MXN
Availability: InStock
Author: Dolbear, Amos
ISBN: 9781522904045

portada First principles of natural philosophy (1897) (en Inglés)

First principles of natural philosophy (1897) (en Inglés)

Formato

Libro Físico

Autor

Amos Dolbear

Editorial

Createspace

Idioma

Inglés

N° páginas

158

Encuadernación

Tapa Blanda

Dimensiones

27.9x21.6x0.9 cm

Peso

0.38 kg.

ISBN13

9781522904045

Categorías

Psicología

First principles of natural philosophy (1897) (en Inglés)

Amos Dolbear (Autor) · Createspace · Tapa Blanda

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Reseña del libro "First principles of natural philosophy (1897) (en Inglés)"

Amos Emerson Dolbear (November 10, 1837 - February 23, 1910) was an American physicist and inventor. Dolbear researched electrical spark conversion into sound waves and electrical impulses. He was a professor at University of Kentucky in Lexington from 1868 until 1874. In 1874 he became the chair of the physics department at Tufts University in Medford, Massachusetts. In 1899 one of his patents was purchased in an unsuccessful attempt to interfere with Guglielmo Marconi's activities in the United States.Dolbear was a graduate of Ohio Wesleyan University, in Delaware, Ohio. While a student at Ohio Wesleyan, he had made a "talking telegraph" and invented a receiver containing two features of the modern telephone: a permanent magnet and a metallic diaphragm that he made of a tintype. He invented the first telephone receiver with a permanent magnet in 1865, 11 years before Alexander Graham Bell patented his model. Later, Dolbear couldn't prove his claim, so Bell kept the patent. Dolbear lost his case before the U. S. Supreme Court, (Dolbear et al. v. American Bell Telephone Company). The June 18, 1881 edition of Scientific American