5o8 



. INDEX. 



Compass, correction of, 303-329 

 description of, 25-2,7, 277- 



285 



early mentions of, 232-235 

 influence of land on 



manner's, 255-266, 501- 



503 . 



magnetising needle, 238 

 method of suspending in 



water, 236-238 

 variation of, 24, 254, 267, 



272-274 

 Compensation of chronometer, 



33;42 



Continuous sounding, 380, 381, 

 ^ 386-388 

 Coulomb, 248 

 Creak, Captain, 257, 261-267, 



50I-5 3 



Crondace, Captain, 125, 126,128 

 Curlew, H.M.S., 489 



DARWIN, George, 158, 189 



Horace, 158 



Dead reckoning, 3, 105-112 

 Declinational tide, 175 

 Deep-sea lead, 49, 52, 365 



sounding, 3, 112-116, 337- 



388 



Deflector, the, 322-329 

 Denny, experimental tank, 480, 



496 ^ 



Depth recorder, 54, 375, 376, 381 

 Devonia, 379, 380 

 Dioptric system in lighthouses, 



393 



Dip, 24, 249, 278 

 Dipping-needle, 21, 278 

 Disk-globe-and cylinder integra- 

 tor, 177 

 Dover, Straits of, influence of, 



on tides, 201-204 

 Duperry, 267 



EARNSHAW, Thomas, 35, 38 

 Earth, figure of, 68-70 



Earth, observations of continual 

 palpitation of, 158-159 



Eastern Province, loss of, 256 



Echelon curves, 482 



Eclipsing lights, 395 



Edington, Captain, 361 



Equilibrium theory of the tides, 

 160, 163, 224-227 



Erichsen's self-registering lead, 

 38i 



Evans, Captain, 204, 207, 266 

 Sir Frederic, 140, 175, 1 88 



FARADAY, 21, 246, 267 

 Faraday, 352 

 Fixed lights, 395, 396, 397 

 Flashing lights, 395, 396 

 Flinders bar, 312-320 

 Fly-boats on Canals, 470-473 

 Plying soundings, 362, 369-371 

 Fronde, 289, 368. 479, 480, 488- 

 496 



GAS, use of in lighthouses, 417 



Gauss, 270 



Gilbert, Dr., 240, 242, 253, 266, 



^ 285, 335 



Glasses, 47-49 



Gravitation, 154, 159, 191 



variation of, due to lunar 



disturbance, 158 

 Gray, 124, 159, 369 

 Great Eastern, 435, 440-442 

 Gridiron pendulum, 37, 38 

 Group flashing light, 400 

 Guiot of Provence's experiment. 

 234, 235 



HALI.EY, 271 



Hardiness of sounding wire, 380 

 Harmonic analyser, 178 

 Harris, Captain, 175 

 Harrison, John, 35, 37, 38, 98 

 Hartnup, 38-42 



