The telegraph manual: a complete history and description of the semaphoric, electric and magnetic telegraphs of Europe, Asia, Africa, and America, ancient and modern.

CONTENTS. 9
CHAPTER XIII.
HISTORY OF THE ENGLISH ELECTRIC TELEGRAPH.
William Fothergill Cooke and the Telegraph-Moncke's Electrometer ExperimentsThe English Electric Telegraph invented-Invention of the Alarum-The Mechanical
Telegraph-The Escapement Apparatus-Mr. Cooke's Efforts to put his Telegraph in
Operation-The Second Mechanical Telegraph-Wheatstone's Permutating KeyBoard-Messrs. Cooke and Wheatstone become associated-The Secondary Circuit
invented-Mr. Cooke improves his Original Telegraph-All the Improvements combined-Description of the Apparatuses-Improvements patented in 1838-Wheatstone's Mechanical Telegraph-Further Improvements by Mr. Cooke........... 179
CHAPTER XIV.
THE ENGLISH ELECTRIC TELEGRAPH.
English Telegraph, and Description of its Electrometer-The Single-Needle Apparatus
-Formation of the Alphabet-Single-Needle Instrlment and Voltaic Circuit-The
Double-Needle Instrument, Alphabet, and Manipulation-The Alarum ApparatusCombining and Arranging of Circuits........................................ 216
CHAPTER XV.
INTERIOR OF THE ENGLISH TELEGRAPH STATIONS.
Interior Arrangements of a Station-Rate of Signalling-The Strand Telegraph Station
-The Public Receiving Department-Blank Fornis of the English Telegraphs. 233
CHAPTER XVI.
DAVY S ELECTRO-CHEMICAL TELEGRAPH.
Nature of the Invention described-The Transmitting Apparatus-The Receiver-The
Instruments combined-The Manipulation-The Signal Alphabet.............. 255
CHAPTER XVII.
BAIN S PRINTING TELEGRAPH.
Description of the Printing Telegraph Apparatus.............................. 269
CHAPTER XVIII.
THE BRETT PRINTING TELEGRAPH.
Brett's Printing Telegraph-Description of the Composing Apparatus-The Printing
Apparatus and Manipulation-The Compositor or Commutator described-Mr. Brett's
Last Im provem ent..................................................... 273
CHAPTER XIX.
THE MAGNETO-ELECTRIC TELEGRAPH.
Application of Magneto-Electricity to Telegraphing-Its Advantages-Description of
Henley's Apparatus-The Bright's Apparatus-Its Comparative Celerity........ 286