Northern lighthouses, Commissioners of, 8-10, 37, 63, 64, 94, 96, 100-02, 105, 109, 114, 219 North-West lightship (Mersey), 240 Nova Scotia: Sable Island lighthouse, 166; floating lighthouses, 285, 290 Nuremberg, tests carried out at, 225-26 Oil-gas, compressed, use of, 48, 296 One Fathom Bank lighthouse, 259-64 “One-tenth flash,” 294 Ontario Lake, 217 Oregon coastline, 13, 195 Orkneys coastline, 108, 109 Otter Rock lightship, 9, 297-99 Ouessant, Ile d’. _See_ Ushant “Outer Automatic,” Halifax Harbour, 290 Outer Diamond Shoal lightship, 147 Outer Minot light, 177, 178 Panama Canal, unattended lighthouses, 277 “Panels,” system of dividing the light by, 31-32 Paraffin, use of, 47 Paris Exhibition of 1867, 61 _Paris_, wreck of the, 7 Parry sound, 216 Patents granted for upkeep of beacons, 5-6 Pei Yu-Shan lighthouse, 39 Pencarrow Head lighthouse, 234 Pentland Firth, 108 Pentland Skerries light, 109 Petroleum gas, use of, 47, 48, 279, 296-98 _Phare_, the term, 3 _Phares, Service des_, 19, 148, 219 _Pharos_, constructional vessel, 110 Pharos, the, Dover, 3; of Alexandria, 2-3 Philippines coastline, 206 Phœnicians, beacons erected by the, 3 Pilgrim Fathers, the, and lighthouses, 6 Pilotage, Board of, Sweden, experiments with acetylene, 292, 293-94 Pino Point lighthouse, 315 Pladda, Island of, 64 Planier lighthouse, 219 Platte Fougère, land-controlled station of, 269-74, 283 Pleasanton, Stephen, 197-98 Plenty, Bay of, 236 Plymouth Harbour, 72 Plymouth Hoe, 80 Poe, General O. M., Spectacle Reef lighthouse, 211-14 Portland Canal, 173 Portland, Duke of, lighthouse on the Isle of Man, 7 Portland stone, used for building Eddystone, 76 Port of Dublin Corporation, 121 Potomac, ice-shores of the, 200-201 Potron, Charles Eugène, generosity of, 157, 159-60 Prince Rupert, port of, 173, 284 Pulsometer Engineering Company, Reading, 66 Punta Gorda light-station, 311 Puysegur Point, 237 Queenstown harbour floating light, 297 Race, Cape, lighthouse, 39, 43; the lens, 40-41; clockwork mechanism, 43; fog-signalling apparatus, 67; dangers of, 162-64; the first beacon, 164-65; the new beacon, 165 Race Rock lighthouse, 203-4 Ralph the Rover, 96 Rame Head, 72 Rathlin light, 313 Rattray Briggs lighthouse, 9 Ray, Cape, 164 Red Rock lighthouse, 210, 216 Red Sea lighthouses, 311 Rennie, John, the Bell Rock light, 97 Reyes Point, 205 Reynaud, Léonce, tower on the Heaux de Bréhat, 149-53 Rhins of Islay, 113 Ribière, 8 Rock Island, 124 Rock of Ages lighthouse, 210, 214-15, 216 Rockall, the, 299-300 Rockets, use of, 58-59 Rose of Mull, the, 113 Rothersand lighthouse, 11, 218; the first attempt, 132-36; work of the Society Harkort, 136-43 Round Island lighthouse, 39 Royale, Isle, 214