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.