Catoptric system of lighting, 28 Centre Island lighthouse, 237 Chance Bros. and Co.: systems of lighting, 33, 36, 42, 55, 256; the hyperradiant method, 38-39; lenses, 40; clockwork mechanism, 43-44; the incandescent mantle, 48; works carried out by, 53, 222 Channel Islands coastline, 269 Charles, Cape, 200 Chatham Island, 239 _Chauffer_, the, 4-6 Chesapeake Bay lights, 199, 200, 308 Chicken Rock light, 9, 94, 238 China, coast-lighting, 258-59 Clear, Cape, 121 Coffin Island, 171 Cohasset Rocks, 177 Colchester Reef lighthouse, 210, 216 Colfax: “Miss Colfax’s light,” 315-16 Collinson, Sir Richard, rocket system invented by, 58-59 “Colossus,” the Rothersand caisson, 138-9 Colton family, the, 170 Columbia River, 183, 184, 185 Colza oil as illuminant, 46, 47 Concrete, reinforced, use of, 18, 174 Cook’s Strait, 233, 234, 237 Cordouan, rocks of, 4 Cordouan, Tour de, 4-5, 30 Cornish plunderers of the Wolf Rock, 88 Corunna lighthouse, 3 Couedie, Cap de, lighthouse, 55 Courtenay, whistling device, 290 Creach, electric light at, 156 Daboll, C. L., invention of the trumpet fog-signal, 59, 60 Dalén, Gustaf: the sun-valve, 49; system of lighting, 274, 275, 291; unattended lights, 269; honour for, 291 note; experiments, 292-93 Danger Point, 230 Darling, Grace, 95, 314 Daudet, Alphonse, “Phares de Sanguinaires,” 93 Delaware Bay, 143, 199, 200 Denmark, coastline, lighting, 48 Detroit River, Lower, 208 “Deviline” toy whistle, 61 Dewey, Admiral, 310 Dhu-Heartach lighthouse, 9, 107, 113-20, 311 Diamond Shoal, dangers of, 205-6; the lightship, 251-53 “Diaphone,” the, 67, 68, 165 Dieppe, 303-304 Differential arc, use of, 227-28 Dioptric system of lighting, 37, 220 Disappointment Cape lighthouse, 186 Distances, table of, 52 “Divergence,” 39 Dog Island lighthouse, 237 Doty burner, the, 238 “Double-shell” principle of construction, 200 Douglass, Sir James: design for the new Eddystone, 78-80; preservation of the Bishop Rock, 86-87; system of lighting, 223 Douglass, William, and the Fastnet, 123 Dover Harbour lightship, 245 Dover, the pharos at, 3 Doyle Fort, 271-74 _Drummond Castle_, wreck, 148 Dues, lighthouse, 4, 7, 239 Duluth, 214 Duncansby Head, 108 Dunedin, N.Z., 236 Dungeness light, 94 Dunkirk, 249 Earraid, 115, 116 East Cape, N.Z., 236 East Indies Archipelago, 257 Eddystone lighthouse: lighting of, 38, 41, 55; fog-signals, 59; description, 72, 82; the Winstanley construction, 73-4; John Rudyerd’s lighthouse, 74, 75, 94; Smeaton’s work, 75, 78, 80; the Douglass tower, 78-80; keepers of, 311 “Eddystones,” 72 Edinburgh, Duke of, 79 Egmont, Cape, 233 Electricity: as luminant, 50-51, 148, 218, 295-96; used in operation of derrick, 159 _Eider_ lightship, 249