Erie, Lake, 208, 216 Estevan Point light, 174 Fair Isle lighthouse, 39 “Family of Engineers (A),” 8-9 Faraday, Professor, 218 Farallon Beacon, 205 Farallon Isles, fog-signalling on, 63 Farne Islands, 95, 314 Faro, the, 3 Fastnet lighthouse, 121-31; lighting, 41; keepers, 311 Ferro-concrete, use in construction, 18-19 _Feu-éclair_, the, 56 Finisterre, Cape, 3; the Ar-men light, 20-24 Fire Island lighthouse, 250 Fire Island lightship, 240, 242, 250 Fisher’s Island Sound, 203 Flamborough Head light, 95 Flannen Islands lighthouse, 9, 113; disappearance of keepers, 313-14 Flat Holme light, the, 7 Florida coastline, 201 “Focal point,” 39 Fog-signals: discharge of guns, 57-58; rockets, 58-59; explosion of gun-cotton, 59; the Daboll trumpet, 59-60; the siren, 60-62; blowing-holes, 62-63; installation on Ailsa Crag, 63-66; diaphone on Ailsa Crag, 66-68; the acetylene gun, 68-71; diaphone at Cape Race, 165; Belle Ile diaphone, 170 Foix, Louis de, 4-5, 8 _Forfarshire_, the, 95, 314 Forteau Bay, 169 Forth, Firth of, lighthouses in, 7, 218-19 Fourteen Foot Bank, 132, 143-47 Foveaux Strait, 237 Fowey Rocks lights, 201-3 French coast: lighting of, 148; lightships, 243, 249 French Lighthouse Commission (1811), 29 Fresnel, Augustin: system of lighting, 28, 33, 286; adopted by the United States, 36 Gap Rock lighthouse and signal-station, 264 Gas Accumulator Company, of Stockholm, 49, 274, 291 Gas as illuminant, the incandescent mantle, 47-48 Gasfeten tower, 274 Gedney’s Channel, lighting of, 295-96 General Superintendent of Lights, office of, 197-98 Georgian Bay, 216 Gerholmen light-boat, 294 Germany: coastline of, lighting, 48, 50-51; the lightship service, 249-50 Gironde lighthouse, 19 Gironde, the, rocks of the estuary, 3-4 Goodwin Sands, 205, 240, 244-45, 248 Grand Banks, the, 163 Grande Braye Rock, 296 Grand Trunk Pacific, 173 Granite, use of, 18 Great Lakes of North America: lighting of the, 27, 173, 208-17; Lighthouse Board, control of, 206; floating lighthouses, 286 Green Cape lighthouse, 232-33 “Grouting,” 27 Guantanamo Bay, 308 Guernsey coast lighthouse, 9, 16; unattended lights, 269 Gun-cotton, explosion of, 58, 59 Halifax Harbour: lights, 192; the “Outer Automatic,” 290 Halpin, George, the Fastnet lighthouse, 121-23, 129 Hand Deeps, 79 Hanois lighthouse, 16 Hargreaves, Riley and Co., 260 Harkort, Society of, Duisburg, 133-34: the Rothersand contract, 136-43 Hatteras, Cape: coastline, 147, 251-53; sandbanks, 205-6, 240 Hauraki Gulf, 238 Hawaiian Islands, 206 Hebrides, lighthouses of the, 112, 313 Heligoland lighthouse, 133, 218; use of the rocket system, 59; the electric installation, 224-26 Hellespont, Sigeum lighthouse, 2 Henlopen Cape, light, 199