Part 35

Combustion, 82 et seq.

Commerce, 8, 97

Constantine, 42

Copper, 262, 295

Cornwall, 63

Cotton: 101; carbon filaments, 129, 130

Cromartie, 78

Crookes, 90, 146

Crosley, Samuel, improvement of gas-meter by, 76

Crusies, 32

Daguerre, 258

Dancing, 346

Davy, Sir Humphrey: 33, 68, 73; first use by, of charcoal for sparking points, 112; notes of, on electric arc, 113; 114

Daylight, artificial, 12: 284 et seq.; application of, 287

Daylighting, 12-14

Dollond, 195

Doty, 61, 167

Drake, Col. E. L., discovery of oil in Pennsylvania by, 56

Drummond, Thomas: 171, 185, 196; quoted on signaling, 197

Dudgeon, Miss, 251, 252

Dyes, 256, 265

East Indies, 29

Eddystone Light, 166, 167

Edison: and problem of electric incandescent filament lamps, 128 et seq.; 129; quoted on birth of incandescent lamp, 130

Edward I, 274

Edward VI, 49

Efficiency, effect of artificial light upon, 14

Eggs: relation of artificial light to production of, 247, 248