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Alfred Vail. The American Electro Magnetic Telegraph
The American Electro Magnetic Telegraph
Table of Contents
INTRODUCTION
THE ELECTRO MAGNETIC TELEGRAPH
THE GALVANIC BATTERY
THE WIRE
THE ELECTRO MAGNET
ALPHABET
Specimen of the Telegraphic Language
CORRESPONDENT OR KEY
THE LEVER KEY
The circuit of the Electro Magnet, closed and broken by the movement of the lever itself, acted upon by the Electro Magnet. Showing the rapidity with which it is possible to close and break the circuit
CONDUCTING POWER AND GALVANIC. ACTION OF THE EARTH
Six Independent Circuits, with six wires, each wire making an independent line of communication
MODE OF SECRET CORRESPONDENCE
THE GALVANOMETER. OR GALVANOSCOPE
An Interesting Experiment of Supporting a Large Bar of Iron within the Helix. Discovered by Mr. Vail, January, 1844
APPLICATION OF THE ELECTRO MAGNETIC TELEGRAPH. TO THE DETERMINATION OF LONGITUDE
MODE OF CROSSING BROAD RIVERS, OR. OTHER BODIES OF WATER, WITHOUT WIRES
TELEGRAPHIC CHESS PLAYING
First Game of Chess
Second Game
Improvement in the Magneto Electric Machine, and Application of this Instrument to operate the Magnetic Telegraph
REPORTS TO CONGRESS ON THE SUBJECT. OF ELECTRO MAGNETIC TELEGRAPHS
HISTORY OF TELEGRAPHS,
Employing Electricity in Various Ways for the Transmission of Intelligence
Lomond’s Electrical Telegraph
Reizen’s Electric Spark Telegraph
Dr. Salva’s Electric Spark Telegraph
Origin of Galvanism
The Decomposition of Water
Samuel Thomas Soemmering’s Description of his Voltaic Electric Telegraph, invented in 1809
Extract from the Journal of the Franklin Institute, vol. 20, page 325
Ronald’s Electric Telegraph, invented in 1816
Electro Magnetism
The following Extract is taken from a Work on Electro Magnetism published by Jacob Green, M. D. Professor of Chemistry in Jefferson Medical College, 1827
Triboaillet’s Proposition
Fechner’s Suggestion.[22]
Magneto Electricity
Dr. Page’s Magneto Electric Machine
The Pole Changer
Professor Morse’s American Electro Magnetic Telegraph, invented, 1832
Schilling Electric Telegraph
[27]The Electro Magnetic Telegraph, of Counsellor Gauss and Professor William Weber, invented at Göttingen, 1833
Experiment of Messrs. Taquin & Ettieyhausen.[28]
Electro Magnetic Printing Telegraph, invented by Alfred Vail, September, 1837
Wheatstone’s Electric Needle Telegraph, invented in 1837
Steinheil’s Electric Telegraph
Masson’s Electric Telegraph
Davy’s Needle and Lamp Telegraph
Alexander’s Electric Telegraph, from the (Scotsmen) Mechanic’s Magazine, Nov. 1837
Extract from the Report of the Academy of Industry, in reference to a suggestion of M. Amyot of an Electric Telegraph
Edward Davy’s Electric Telegraph.[34]
Bain’s Printing Telegraph
Wheatstone’s Rotating Disc Telegraph, invented, 1841
