A Manual of Scientific Enquiry: Prepared for the Use of Officers in Her Majesty's Navy; and Travellers in GeneralJohn Frederick William Herschel, Robert Main |
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Page xii
... circle , 108 - Observations of the total force with Barrow's circle , 110- Directions for using Fox's apparatus for observing the magnetic inclination and force , 112– Observations of inclination at sea , 113 - Observations of intensity ...
... circle , 108 - Observations of the total force with Barrow's circle , 110- Directions for using Fox's apparatus for observing the magnetic inclination and force , 112– Observations of inclination at sea , 113 - Observations of intensity ...
Page xvii
... circle or zone , 351 - Remarks on doubtful phenomena worthy of record , 352 — Observations proper to be made in a city overthrown or affected by an earthquake , 352 - Local conditions to be recorded , 353- Secondary phenomena to be ...
... circle or zone , 351 - Remarks on doubtful phenomena worthy of record , 352 — Observations proper to be made in a city overthrown or affected by an earthquake , 352 - Local conditions to be recorded , 353- Secondary phenomena to be ...
Page 8
... circle be mounted on a stand ) , unless the stay at the port is so long that transits of the moon can be observed . In any case , if there be a transit - instrument in the ship , it ought to be mounted on shore as soon as possible . The ...
... circle be mounted on a stand ) , unless the stay at the port is so long that transits of the moon can be observed . In any case , if there be a transit - instrument in the ship , it ought to be mounted on shore as soon as possible . The ...
Page 91
... circle , differing little from the accustomed form of an Inclinometer , except that the needle is supported by the ends of the axle , which terminate in cylinders of small diameter working in jewelled holes . A small grooved wheel is ...
... circle , differing little from the accustomed form of an Inclinometer , except that the needle is supported by the ends of the axle , which terminate in cylinders of small diameter working in jewelled holes . A small grooved wheel is ...
Page 100
... circle . Suspend the brass plummet , and allow it to come to rest , turning the torsion - circle at the top of the suspension - tube until the marked side of the lower suspension - pin is towards the north . Remove the plummet and ...
... circle . Suspend the brass plummet , and allow it to come to rest , turning the torsion - circle at the top of the suspension - tube until the marked side of the lower suspension - pin is towards the north . Remove the plummet and ...
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A Manual of Scientific Enquiry: Prepared for the Use of Officers in Her ... John Frederick William Herschel No preview available - 2017 |
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actinometer afford altitude angles animals ascer ascertained atmospheric wave azimuth barometer Cape Horn carefully centre character chronometer circle coast colour column coral correct currents deflection deflector depth desirable determined dipping needle direction distance earth earth-wave earthquake Edition especially Fcap fissures fossil geographical geology height high water horizontal igneous rocks important inches inclination inquiry instrument islands known land latitude longitude lunitidal interval magnetic force magnetic moment maps means measure mercury meridian Mineralogy minerals minute moon's transit nature navigation needle noted objects observations obtained occur ocean origin phenomena port portion position possible Post 8vo preserved quadrupeds racter reefs remarks rivers rocks scale seismometer sextant shells ship shock shore skin specimens stations strata stream surface taken temperature thermometer tide tide-wave tion tribe tube vernier vertical vessel vibration Vols voyage wind Woodcuts zodiacal light
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Page 327 - the transit of a wave or waves of elastic compression in any direction from vertically upwards to horizontally, in any azimuth, through the crust and surface of the earth, from any centre of impulse or from more than one, and which may be attended with sound and tidal waves, dependent upon the impulse and upon circumstances of position as to sea and land.
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Page iii - It is the opinion of the Lords Commissioners of the Admiralty, that it would be to the honour and advantage of the Navy, and conduce to the general interests of science, if new facilities and encouragement were given to the collection of information upon scientific subjects by the officers, and more particularly by the medical officers, of Her Majesty's Navy, when upon foreign service...
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Page 93 - ... and if the amount is large, the heeling error is corrected by the application of a vertical magnet. The whole process is described, and all the mathematical formula and arithmetical processes, and a number of convenient graphic methods, are given in the "Admiralty Manual for ascertaining and applying the Deviations of the Compass caused by the Iron of a Ship.
Page 76 - Mistakes and errors have often been produced in tide observations by supposing that the turn of the tide-stream is the time of high water. But this is not so. The turn of the stream generally takes place at a different time from high water, except at the head of a bay or creek. The stream of flood commonly runs for some time, often for hours, after the time of high water. In the same way, the stream of ebb runs for some time after low water.