The Complete Mathematical and General Navigation Tables: Including Every Table Necessary to be Used with the Nautical Almanac in Finding the Latitude and Longitude : with Their Description and Use, Comprising the Principles of Their Construction, and Their Direct Application to Plane and Spherical Trigonometry, Navigation, Nautical Astronomy, Dialling, Practical Gunnery, Mensuration, Guaging &c. &c, Τόμος 1Baldwin and Cradock, 1828 - 664 σελίδες |
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Αποτελέσματα 1 - 5 από τα 100.
Σελίδα xxix
... taken at any hour of the night ; to find the latitude of the place of observation .... 337 VII . Given the latitude by account , the sun's declination , and two observed altitudes of its lower or upper limb ; the elapsed time , and the ...
... taken at any hour of the night ; to find the latitude of the place of observation .... 337 VII . Given the latitude by account , the sun's declination , and two observed altitudes of its lower or upper limb ; the elapsed time , and the ...
Σελίδα xxxii
... taken at the time of its transit over the meridian of any known place ... ... 496 Given the true course between two places , and the variation of the compass ; to find the magnetic or compass course Given the magnetic course , or that ...
... taken at the time of its transit over the meridian of any known place ... ... 496 Given the true course between two places , and the variation of the compass ; to find the magnetic or compass course Given the magnetic course , or that ...
Σελίδα xxxiii
... taken at any point in the same horizontal plane ; to find the distance between that point and each of the objects 532 534 536 Given the distances between three objects , and the angular dis- tances between those objects taken at any ...
... taken at any point in the same horizontal plane ; to find the distance between that point and each of the objects 532 534 536 Given the distances between three objects , and the angular dis- tances between those objects taken at any ...
Σελίδα xxxix
... taken out at first sight , without subjecting the mariner to the necessity of making proportion for the odd minutes of altitude . This improvement will have a tendency to facilitate nautical calculations . Table X. - The arrangement of ...
... taken out at first sight , without subjecting the mariner to the necessity of making proportion for the odd minutes of altitude . This improvement will have a tendency to facilitate nautical calculations . Table X. - The arrangement of ...
Σελίδα xxxix
... taken , in order to find the absolute value of the an- nual variation of the true spherical distance between the fixed stars ; and the author trusts that he has so far succeeded as to render this part of the table permanent for a long ...
... taken , in order to find the absolute value of the an- nual variation of the true spherical distance between the fixed stars ; and the author trusts that he has so far succeeded as to render this part of the table permanent for a long ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
24 hours ascension at noon auxiliary angle celestial object co-secant co-sine co-tangent column computed Constant log Correction of ditto corresponding course and distance decimal declination at noon degrees departure Diff difference of latitude difference of longitude dist east equation Example fixed star Greenwich Half sum hence horizontal parallax hypothenuse King's Island leg AC mean merid meridian meridian of Greenwich meridional altitude meridional difference middle latitude miles minutes moon's apparent altitude Moon's reduced Moon's true natural number natural versed sine Nautical Almanac observed altitude perpendicular place of observation planet's Port Jackson Problem Prop proportional log radius reduced right ascension refraction required the true RULE secant seconds semi-diameter side A B spherical distance spherical triangle spherical trigonometry subtracted sun's declination sun's lower limb Sun's reduced right Sun's right ascension Table tangent true altitude true central altitude true central distance watch
Δημοφιλή αποσπάσματα
Σελίδα 19 - Given two sides and the included angle, to find the third side and the remaining angles. The sum of the required angles is found by subtracting the given angle from 180°. The difference of the required angles is then found by Theorem II. Half the difference added to half the sum gives the greater angle, and, subtracted, gives the less angle.
Σελίδα 484 - AZIMUTH, in astronomy, an arch of the horizon, intercepted between the meridian of the place and the azimuth, or vertical circle passing through the centre of the object, which...
Σελίδα 212 - For the purpose of measuring angles, the circumference is divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; each minute into 60 equal parts called seconds.
Σελίδα 63 - And, if the logarithm of any number be divided by the index of its root, the quotient will be equal to the logarithm of that root. Thus the index or logarithm of 64 is 6 ; and, if this number be divided by 2, the quotient will be = 3, which is the logarithm of 8, or the square root of 64.
Σελίδα 63 - Also, between the mean, thus found, .and the nearest extreme, find another geometrical mean, in the same manner ; and so on, till you are arrived within the proposed limit of the number whose logarithm is sought.
Σελίδα 487 - ... reckoned from the north in north latitude, but from the south in south latitude. » In observations of the altitude of the sun'< loiter limb (by afore enervation) it is u«u»l to »<M 12' for tic cBecl of dip, parallax, ami sern diameter.
Σελίδα 159 - When there happens to be a remainder after the division ; or when the decimal places in the divisor are more than those in the dividend ; then ciphers may be annexed to the dividend, and the quotient carried on as far as required.
Σελίδα 681 - The Young Navigator's Guide to the Sidereal and Planetary Parts of Nautical Astronomy.
Σελίδα 649 - ... position with respect to a luminous body, can cast a circular shadow ; likewise all calculations of eclipses, and of the places of the planets, are made upon supposition that the earth is a sphere, and they all answer to the true times when accurately calculated. When an eclipse of the moon happens, it is observed sooner by those who live eastward than by those who live westward ; and, by frequent experience, astronomers have determined that, for every fifteen degrees difference of longitude,...
Σελίδα 183 - II. The sine of the middle part is equal to the product of the cosines of the opposite parts.