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INDEX.
Page.
Chemical Telegraph, Davy’s. 255
“ “ Smith & Bain’s... 354
“ “ Rogers & West-brook’s.-. 370
Chappe Semaphore Telegraph. 27
Chappe Semaphore Telegraph, Adoption
Chappe Semaphore Telegraph, first Dis-patch of.. 28
Chappe Semaphore Telegraph, Appara-tus of. 32
Chappe Semaphoie Telegraph, Alphabet
of. 34
Chemical Action of Voltaic Battery . 86
Chesters Battery Improvement.102
‘ Cable Manufactory.604
Cincinnati Telegraph Station.458
Circuit?, Electric. 480
“ of Morse ’s First Telegraph. 411
“ Cooke & Wheatstone’s. 194
“ Local, Invented by Morse.418
“ of the Morse Telegraph .480,488, 497
“ Stager’s Arrangement of.492
“ Changers.. 436
Clark’s Telegi aph Insulator. 532
Clay’s, Edward C., Telegraph Improve-ment . 733
Clocks, Regulation of, in Russia .783
Combining of Circuits.402, 411, 494
Conductors of Electric Currents. 513
Conduct bility of Metals.— 513
Conductibility of Earth Circuit. 162
Conductors of Steiuheil’s Telegraph. ... 159
Conductors of Static Electricity. 52
Congressional Report on Morse’s Tele-graph. 413
Construction of Experiment, 1844, Ame rica .413
Comparative Intensity and Quantity of
Batteries.. 104
Coulomb’s Theories of Electro-statics... 56Companies, American , Organization of.. 748Coleman’s, Andrew, Telegraph Improve-ment . 729
Construction of American Telegraph
Lines. 668
Cooke. William Fothergill. 179
“ invents the English Telegraph .... 179
“ First Apparatus. 181
w Alarum Apparatus. 185
“ Invents a Mechanical Telegraph.. 185“ Invents an Escapement Apparatus. 188“ Invents a Second Mechanical Tele-graph. 190
“ becomes Partner with Professor
Wheatstone. 193
“ Recognized as the Inventor of the
<k Improves his Telegraph. 196
“ Apparatuses described. 199
u Improvements of 1838. 207
u Improved Mechanical Telegraph.. 213
“ Cooke’s Insulator. 529
Copying Telegraph, Bakewell. 304
Corfu Telegraph. 620
Crossing of River, over Masts , in Europe . 657u “ i,: America . 662
Cruikshank’s Battery. 88
Currents, Electric.496
“ Intensity and Quantity of. 496
Dalibard’s Experiments. 58
Danish Subterranean Telegraphs. 587
Baltic Sea Cable. 616
Davy’s Electric Telegraph .255
Page.
De-la-Rive Pving explained. 120
Description of the English Telegraph ... 216<k “ Morse “ .... 422
“ of Electrical Machines. 62
Delor's Experiments. 59
Depth of the Ocean. 648
Decrees as to the French Telegraphs .... 769
Divine Telegraph. 18
Discovery of the Leyden Tar. 53
Distribution of Electricity. 65,501
Discovery of Electro-Magnetism. 114
Discoveries of Steinheil. 178
Dispatch Forms, English Telegraph. 246
“ “ American Tk -- 467
Digging of Telegraph Holes. 668
Dial Telegraph, Germanic. 313
Donaghadie Submarine Cable.614
Dover and Calais Submarine Cable. 607
Double Needle Telegraph described. 224
Durability of Telegraph Poles. 081
u Conductibility of. 162
“ for Telegraphing . 179
“ of English Telegraphs ... 216
Electric Circuit, Conductors. 513
Electric Currents, Intensity and Quantity
of. 498
“ “ Retardation of. 506
“ u Return of... 501
Elbe River Crossing. 659
Electric Time-Ball. 741
Electrical Action of the Battery. 86
Electro-Magnetism, Discovery of.114
Electro-Magnetic Laws. 119
Electro-Magnets , how made. 120
Elements of the Ocean.653
Electricity, Origin of. 51
“ Static.. 51
“ Voltaic. 77
“ Negative and Positive.. 55
“ and Lightning Identical.... 56
“ Distribution of. 65, 501
Electrical Machines described. 62
Experiments with the Leyden Jar. 70
Electric Telegraphs. 132
tk Alexander’s. 139
“ Bain’s Printing. 269
u “ Chemical . . 354
“ Brett’s Printing .... 273
“ Bakewell’s Copying. 304
“ Baron Schelling’s... 135
“ Bell Apparatus. 346
“ Cooke’s. 179
“ Davy’s Chemical ... 255
“ “ Railway. 334
u Froment’s Writing .. 373
“ Gauss and Weber’s .. 137
“ Henley’s.289
“ House Printing. 391
“ Highton’s . 295
“ Lomond’s. 132
“ Morse’sElectro-Mag-
netic. 402
“ Nott’s . 410
“ Reisin’s. 133
“ Ronaldo’s. 147
u Salva’s. 135
“ Smith and Bains... 354
“ Seimens and Halskie’s 313
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