“First Men in the Moon, The,” H. G. Wells, cited, 148

Fish:  artificial light as bait for, 249

Flame-arcs, 120, 121, 122, 187

Flames:  86, 88, 89;
  open, 233, 234 et seq.

Flint, 33

Fool’s gold, 18

Fort Wagner, 185

France:  lamps in, 55;
  early gas-light in, 72

Franchot, invention of moderator lamps by, 55

Frankland, 77

Franklin, Benjamin:  165;
  quoted, 210-212; 213

Fresnel, 167, 196

Friction, 16, 17

Gas:  13, 22;
  discovery of coal, 32, 33;
  early uses of, as light-source, 63 et seq.;
  installment of, pipes in England, 63, 64;
  Shirley’s report on Natural, 66, 67;
  first public display of, lighting, 69;
  cost of, lighting, 71;
  first attempt at industrial, lighting, 72;
  first English, company, 74;
  first, explosion, 75;
  house, lighting, 76, 77; 80, 82;
  spectrum of, 90;
  modern, lighting industry, 97 et seq.;
  origin of lighting by, 98;
  first, works in America, 98;
  growth of, consumption in United States, 99;
  electrical ignition applied to, lighting, 102;
  pressure, 102, 103;
  water, 105;
  carbons in, 106;
  production of Pintsch, 109, 110;
  salts applied to, flames, 120; 157;
  Census Bureau figures on cost of, plants, 221, 222; 224, 341

Gas-burners:  63, 64, 77;
  candle-power of pioneer (table), 79;
  improvements in, 84

Gas-mantle:  61, 81;
  influence of, 99;
  characteristics of, 100 et seq.; 187

Gas-meter, Clegg’s, 76

Gasolene:  lamps, 55; 57

Gassiot, 114

Gauss, 196

Geissler, 146

General Electric Company, 132, 135, 136

Germany:  development of lamps in, 56;
  early gas-lighting in, 72

Glass, 195, 290 et seq.

Glowers, 139

Glow-worms, 24

Glycerides, 52

Gold, 293

Gout, 275

Gramme dynamo, 117

Grass:  18;
  carbon filaments, 129

Greece:  39;
  sacred lamps in ancient, 41; 42

Greenhouses, carbon-filament lamps in, 250 et seq.

Hall of Fame, 134

Happiness, effect of artificial light upon, 14
Hayden and Steinmetz, 253

Health, artificial light in relation to, 269-283

Helium, 89

Hemig, 155

Hemp, 21

Henry, William, 75

Herodotus, 56

Hertz, 68

Hertzian waves, 271

Hewitt, Cooper, produces mercury-arcs, 124, 125

Home:  artificial light in relation to, 6;
  lighting, 325 et seq.

Hindu:  light in, ceremonials, 40

Hudson-Fulton Celebration, 306

Huygens, 195