Alfred Vail

CONTENTS.

THE ELECTRO MAGNETIC TELEGRAPH.

THE LEVER KEY.

REPORTS TO CONGRESS ON THE SUBJECT OF ELECTRO MAGNETIC TELEGRAPHS.

HISTORY OF TELEGRAPHS,

The cover image was created by the transcriber, and is placed in the public domain.

THE AMERICAN
ELECTRO MAGNETIC
TELEGRAPH:

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 demanded the transference of the mail on many chief routes, from the horse-drawn coach on common highways to steam-impelled vehicles on land and water, is equally potent to warrant the calling of the electro magnetic telegraph—that last and most wondrous birth of this wonder-teeming age—in aid of the post office, in discharge of its great function of 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.