The cover image was created by the transcriber, and is placed in the public domain.
WITH THE
REPORTS OF CONGRESS,
AND A DESCRIPTION
OF ALL TELEGRAPHS KNOWN,
EMPLOYING ELECTRICITY OR GALVANISM.
ILLUSTRATED BY EIGHTY-ONE WOOD ENGRAVINGS.
BY ALFRED VAIL,
ASSISTANT SUPERINTENDENT OF ELEC. MAG. TEL. FOR THE U. S.
CANST THOU SEND LIGHTNINGS,THAT THEY MAY GO, AND SAY UNTO THEE, HERE WE ARE?—JOB.
“The same principle which justified and demandedthe transference of the mail on many chief routes, from the horse-drawncoach on common highways to steam-impelled vehicles on land and water,is equally potent to warrant the calling of the electro magnetictelegraph—that last and most wondrous birth of this wonder-teemingage—in aid of the post office, in discharge of its great functionof rapidly transmitting correspondence and intelligence.” Rep. of Com. of Ways and Means of H. R., 1845.
PHILADELPHIA:
LEA & BLANCHARD.
1845.
ENTERED, according to Act of Congress, in the year 1845,
By ALFRED VAIL,
In the Clerk’s Office of the District Court of the United States,
in and for the District of Columbia.
DESCRIPTION OF THE AMERICAN ELECTRO MAGNETIC TELEGRAPH. | |
PAGE. | |
Introduction, | 7 |
The Galvanic Battery, | 9 |
The Wire, | 13 |
The Electro Magnet, | 13 |
The Register, | 18 |
The Correspondent, | 22 |
The two Dependent Circuits, | 23 |
The two Independent Circuits, | 24 |
The operation of the Electro Magnetic Telegraph, | 25 |
The Telegraphic Alphabet, | 27 |
Specimen of the Telegraphic Language, | 28 |
Telegraphic Alphabets for two, three, four, five, and six pens, | |
operating together, or in succession, | 30 ... BU KİTABI OKUMAK İÇİN ÜYE OLUN VEYA GİRİŞ YAPIN!Sitemize Üyelik ÜCRETSİZDİR! |