INDEX

A

Ampere's telegraph, 42. Anglo-American Telegraph Co., 134. Ardois signal system, 30. Atlantic cable projected, 109; attempted, 117, 121, 123, 133; completed, 124, 136. Audion amplifier, 256. Automatic telegraphy, 53, 105, 266.

B

Baltimore-Washington Telegraph Line, 86. Bell, Alexander Graham, parentage, 140; youth, 141; teaches elocution, 146; experiments with speech, 151, 161; meets Henry, 158; invents telephone, 162; at Centennial Exposition, 165; demonstrates telephone, 170; Bell Telephone Association, 178; Bell-Western Union Settlement; Bell and wireless telegraphy, 189; Transcontinental telephone, 248. Bethell, Union N., 241. Blake, Clarence J., 154. Blake, Francis, invents telephone transmitter, 182. Branly coherer, 204. Brett, J.W., 112. Bright, Charles Tiltson, 112, 120, 125, 128.

C

Cable laid across Channel, 108. Carty, J.J., youth, 232; enters telephone field, 234; Carty and the switchboard, 235, 242; uses metallic circuit, 238; in New York City, 241; invents bridging bell, 243; chief engineer, 244; extends long-distance telephone, 246; seeks wireless telephone, 253; talks across continent by wireless, 257. Clepsydra, 18. Code flags at sea, 24. Coherer, 203. Colomb's flashing lights, 25. Congress votes funds for telegraph, 84. Cooke, William P., 49, 52. Cornell, Ezra, 86, 93, 107.

D

Davy's needle telegraph, 44. De Forest, Dr. Lee, 225, 256. Dolbear and telephone, 185; wireless telegraphy, 194. Drawbaugh case, 186. Duplex telegraphy, 104, 265. Dyar, Harrison Gray, 41.

E

Edison, and the telegraph, 104; telephone transmitter 180; wireless telegraphy, 195. Ellsworth, Annie, 85.

F

Field, Cyrus W., plans Transatlantic cable, 110; honors, 125, 136; develops cable, 130, 134.

G

Gale, Professor, 67, 86. Gauss and Weber's telegraph, 43. Gisborne, F.N., 109. Gray, Elisha, 157, 184. Great Eastern, 132, 135, 139. Guns as marine signals, 23.

H

Hammond, John Hays, 229. Heaviside, A.W., 196. Heliograph, 29. Henry, Joseph, 65, 67, 158, 169. Hertz and the Hertzian waves, 197. Hubbard, Gardiner G., 149, 159, 170, 178. Hubbard, Mabel, 148, 166.

I

Indian smoke signals, 20.

J

Jackson, Dr. Charles T., 64, 79.

K

Kelvin, Lord (See Thomson), 138. "Kwaker" captured, 50.

L

Long-distance telephone, 245.

M

Magnetic Telegraph Co., 93. Marconi, boyhood, 199; accomplished wireless telegraphy, 202; demonstration in England, 209; Transatlantic telegraphy, 217; Marconi Telegraph Company, 220. Marine signals on Argonautic expedition, 15. Mirror galvanometer, 127. Mirrors of Pharaoh, 17. Morse at University of New York, 66. Morse, code in signals, 27; parentage, 56; at Yale, 57; art student, 59; artist, 62; conceives the telegraph, 63; exhibits telegraph, 75; offers telegraph to Congress, 76, 91; patents telegraph, 82; submarine cable, 83, 107; erects first line, 86; dies, 104. Multiplex printer telegraph, 274. Mundy, Arthur J., 31.

O

O'Reilly, Henry, 94.

P

Preece, W.H., 196, 209. Printing telegraph, 271. Pupin, Michael I., 247.

Q

Quadruplex telegraphy, 104, 265.

R

Reis's musical telegraph, 157.

S

Sanders, Thomas, 148, 159, 178. Scribner, Charles E., 236. Searchlight telephone, 251. Semaphore signals, 27. Shouting sentinels, 16. Sibley, Hiram, 96, 99. Signal columns, 19. Siphon recorder, 137. Smith, Francis O.J., 76. Stentorophonic tube, 18. Submarine signals, 31.

T

Telegraph, first suggestion, 39; patented, 82; development, 264. Telephone invented and patented, 162; at Centennial, 165; exchange, 177. Thomson, youth, 144; cable adviser, 121; invents mirror galvanometer, 126; knighted, 136; invents siphon recorder, 137; connection with telephone, 169. Transatlantic cable (See Atlantic cable). Transatlantic wireless telegraphy, 216. Transatlantic wireless telephone, 259. Transcontinental telegraph, 96. Transcontinental telephone, 246. Transcontinental wireless telephone, 257. Trowbridge, John, 190. Troy, signaling fall of, 14. Tuning the wireless telegraph, 222.

V

Vail, Alfred, arranges Morse code, joins Morse, 70; makes telephone apparatus, 72; operates first line, 90; improves telegraph, 100. Vail, Theodore, joins telephone forces, 180; puts wires underground, 239; adopts copper circuits, 240; resumes telephone leadership, 244; talks across continent without wires, 257.

W

Watson, aids Bell with telephone, 159; telephone partner, 175; helps demonstrate telephone, 175; telephones across continent, 248. Western Union, organized, 96; enters telephone field, 178. Wheatstone, 1; boyhood, 45; five-needle telegraph, 49; single-needle telegraph, 52; Wheatstone-Cooke controversy, 52; automatic transmitter, 53; bridge, 53; opposes Morse, 78; encourages Bell, 145. Wig-wag system, 26. Wireless telegraphy suggested, 188; invented, 202; on shipboard, 221; in the future, 230. Wireless telephone, conceived, 250; future, 260; in navy, 261.