The practice of navigation and nautical astronomy. [With] Tables [and] Supplement to the first ed, Τόμος 261870 |
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Σελίδα xxv
... Coast Castle 44 I Gibraltar 22 2 Clarence Cove 44 3 Valetta 28 2 Ascension ... 45 I FUNCHAL 40 1 St. Paul de Loando 45 Porto Grande 41 2 Table B. 46 2 Bermuda 42 I Trincomalee ... 60 I River Gambia 42 4 Hong Kong .. : 71 C. Sierra Leone ...
... Coast Castle 44 I Gibraltar 22 2 Clarence Cove 44 3 Valetta 28 2 Ascension ... 45 I FUNCHAL 40 1 St. Paul de Loando 45 Porto Grande 41 2 Table B. 46 2 Bermuda 42 I Trincomalee ... 60 I River Gambia 42 4 Hong Kong .. : 71 C. Sierra Leone ...
Σελίδα 127
... coast - line is filled in by hand . III . PROPERTIES OF CERTAIN PROJECTIONS . 392. Since a small portion of a globular surface may be con- sidered , in a practical sense , as a plane , charts of coasts , and maps of * In order to verify ...
... coast - line is filled in by hand . III . PROPERTIES OF CERTAIN PROJECTIONS . 392. Since a small portion of a globular surface may be con- sidered , in a practical sense , as a plane , charts of coasts , and maps of * In order to verify ...
Σελίδα 171
... the sun often shone brightly ( Naut . Mag . 1844 ) . The like circumstances occur in " the Smokes , " on the coast of Africa . obtain an artificial horizon adapted to be used on board INSTRUMENTS OF NAUTICAL ASTRONOMY . 171.
... the sun often shone brightly ( Naut . Mag . 1844 ) . The like circumstances occur in " the Smokes , " on the coast of Africa . obtain an artificial horizon adapted to be used on board INSTRUMENTS OF NAUTICAL ASTRONOMY . 171.
Σελίδα 174
... coast of Timor , in August 1823. - Mémoire sur l'Emploi des Chronomètres à la Mer , par A. P. Givry , extracted from the Annales Maritimes , Paris , 1840 . It has been surmised that the hot and moist climate of the coast of Africa has ...
... coast of Timor , in August 1823. - Mémoire sur l'Emploi des Chronomètres à la Mer , par A. P. Givry , extracted from the Annales Maritimes , Paris , 1840 . It has been surmised that the hot and moist climate of the coast of Africa has ...
Σελίδα 175
... coast of Africa by Admiral Vidal , who , by direction of the Hydrographer , proceeded at once to run down the coast from Sierra Leone to Corisco Bay , and returned to Sierra Leone as quickly as possible . The whole Diff . Long . between ...
... coast of Africa by Admiral Vidal , who , by direction of the Hydrographer , proceeded at once to run down the coast from Sierra Leone to Corisco Bay , and returned to Sierra Leone as quickly as possible . The whole Diff . Long . between ...
Άλλες εκδόσεις - Προβολή όλων
The practice of navigation and nautical astronomy. [With] Tables [and ... Henry Raper Πλήρης προβολή - 1840 |
The Practice Of Navigation And Nautical Astronomy. [with] Tables [and ... Henry Raper Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2019 |
The Practice Of Navigation And Nautical Astronomy. [with] Tables [and ... Henry Raper Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2022 |
Συχνά εμφανιζόμενοι όροι και φράσεις
add the log altitude alts appears azim azimuth bearing called celestial body celestial equator centre chart chronometer circle colat compass Computation corr correction cosec Course and Distance D.Lat decimal decl declination deviation diff difference direction Dist divided employed equal equator error exceeds feet find the Course fraction given gives greater Greenwich Date height of eye Hence horizon interval latitude less logarithms longitude magnetic magnetic bearing measured meridian miles minutes moon moon's multiplied Nautical Almanac nearly observation parallax parallel Parallel Sailing passes Plane Sailing planet pole prime vertical prop quantity radius reckoned reduce refraction result rhumb line right angles Right Ascension sailing Semid sextant shews ship side sine star subtract sum rejecting tens sun's Traverse Table triangle true true alt variation watch
Δημοφιλή αποσπάσματα
Σελίδα 41 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 147 - Since the apparent altitude is too great on account of refraction, and too small on account of parallax, the diff. between these quantities is the diff. between the true and apparent altitudes. This difference, or the combined effect of parallax and refraction, is called the Correction of Altitude. The moon's Corr. of Alt. is given in Table 39; that of a star is merely its refraction. 439. The SEMI-DIAMETER of a celestial body is half the angle subtended by the diameter of the visible disc. Thus...
Σελίδα 38 - A parallelogram is a four.sided figure, of which the opposite sides are parallel; and the diameter is the straight line joining two of its opposite angles.
Σελίδα 19 - The characteristic of a number less than 1 is found by subtracting from 9 the number of ciphers between the decimal point and the first significant digit, and writing — 10 after the result.
Σελίδα 43 - ... section shall be parallel to the remaining side of the triangle. Let DE be drawn parallel to BC, one of the sides of the triangle ABC: then BD shall be to DA, as CE to EA. Join BE, CD; then the triangle BDE is equal...
Σελίδα 105 - The distance between two points on the surface of a sphere is the length of the minor arc of a great circle between them.
Σελίδα 186 - A line drawn from Polaris perpendicular to the line of the Pointers, and on the opposite side to the Great Bear, passes, at 48° distance, through CAPELLA, one of the brightest stars. In this same line, about the same distance on the opposite side of the pole, is a.
Σελίδα 145 - ... of Altitude are circles parallel to the horizon. 431. ZENITH DISTANCE is the arc included between the zenith and the celestial body, or the angular distance of a body from the zenith of which that arc is the measure. The zenith distance is, therefore, the complement of the altitude to 90°, as Z A.
Σελίδα 4 - RULE. Multiply all the numerators together for a new numerator, and all the denominators for a new denominator: then reduce the new fraction to its lowest terms.
Σελίδα 358 - Frigate La Venus, 1836-9, vol. iii. p. 419) paid particular attention to this indication, and remarks that the observations generally shew a lowering of the thermometer on approaching land, but they disprove that the water on a bank is always colder.* 1039. The temperature of the sea has been observed to change several degrees, in intervals of time varying from a few hours to a day and a half previous to a change of wind, the water becoming gradually warmer when the wind was about to blow from a...