INDEX. 



509 



Hedderwick, Captain, 379 

 Henry, Professor, 122, 131 

 Herschel, Sir John, 17 

 Holmes' rescue light, 134-138 

 Hoofer, 349, 360, 361, 363, 368, 



371. 



Hopkinson, 400 

 Horizon, 72, 73 



dip of, 6, 77, 82 



to find distance of, 76, 77 

 Huyghens, 474 



INERTIA, 191, 193, 352 

 Irish Channel, tides in, 168 

 Iron Duke, 1 08 



TENKIN, Professor, 358, 371 

 Johnson, Messrs., 341, 343 



KERR, Captain Lord Walter. 



386 

 Key, Admiral Sir Cooper, 160, 



208 



Lalla Rookh, 96, 337, 383, 385 

 Laplace, theory of the tides, 



160, 168, 169, 213 

 Latitude, 72, 82-85 



by Sumner's method, 94 

 Leighton, Captain, 382 

 Lighthouse characteristics, 389- 



421 



Lochman, 245 

 Log, 42-47 



ground, 46, 47 



Massey, 4, 46, 48 

 Longitude, 35-37, 72, 85 

 Luminiferous ether, 78 note 

 Lunars, 78, 8 1, 85, 98 

 Lushington, Profess jr, 17 note 



MAGNETIC charts, 22, 23 

 meridians, 21 



Magnetic north, 20 



poles, 22, 24 

 Magneti-ing magnet, 238 

 Massey log, 4, 46, 48, 108 



sounding fly, 49-51, 114 

 Afeda, H.M.S., 260263, 5<>i- 



503 

 M creator's projection, 29-32, 



89 



Meridian, 71 

 Mile, nautical, 45, 73, 74, 422 



British statute, 74, 422 

 Minotaur, H.M.S., 386 

 Moon, influence of, on weather, 

 1 88 

 attraction of, on water of 



earth, 150, 154, 194 

 Moriarty, Captain, 93, 1:3,221, 



383 



Morse Colomb flashing alpha- 

 bet, 400 



alphabet generalized, 130, 



421 

 Munro, Captain, 379 



Nautical Almanac, 3, 83 and 

 note, 85, 88, 103 



Navigation defined, i, 2 

 astronomical, 3, 68-105 



Neap tides, 161-163 



Newton, Sir Isaac, 4, 35, 98, 

 99, 153. 191-198 



Norman, Robert, 249, 273, 278 



North celestial pole, 12 

 magnetic pole, 22, 25 

 terrestrial pole, 12, 25 



OCCULTING lights, 395, 397 

 Orbis virtutis of Gilbert, 246 

 Orlando, H.M.S., 490 



Palm, 382 



Parallel middle body, 492-495 



Paranese, 361 



