Part 28

Hall Island, 130.

Hall, Professor, 131.

Hand, illustration, 168.

Harkness’s Observations, 44.

Harvests, 90.

Hastings, Professor, 60.

Heat: development, 13; concentration, 19; loss, 29; confinement, 33; sensation, 71; vibrations, 72; energy, 91; amount, 92, 97; computation, 94–96; diminution, 101; emission, 102; storage, 111; in sugar, 188. (See Flames, Sun.)

Hecla, 164, 181.

Hedgehog-spines, simile, 68.

Helmholtz’s Estimates, 98.

Hengist and Horsa, 1. (See Britain.)

Hercules, 238.

Herschel, Sir John: sun-spots, 12–14; electric storms, 88; comet’s tail, 216.

Herschel, Sir William: avoidance of light, 18; prices, 79; sun-spots (q. v.), 129.

Herschel’s Outlines, 11.

Holden, Professor, 124.

Honeycomb Structure, 30.

Huggins’s Experiment, 234, 235.

Humanity, deified, 172.

Human Race, 250.

Humboldt, 195.

Humming-bird, 70.

Hunt, Professor, 136, 219.

Hydrogen, 68, 99, 237.

Ibrahim, King, story, 194, 195.

Ice: melted, 95, 96; never melted, 163, 164.

Imbrian Sea, 151.

Insects, 224, 250. (See Ants, Bees.)