A Complete Epitome of Practical Navigation ...author, and sold, 1852 - 688 páginas |
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Página 13
... DEGREES ; each degree into 60 equal parts , called MINUTES ; each minute into 60 equal parts , called SECONDS ; and so on . Degrees , minutes , and seconds , are thus expressed , 40 ° 32 ′ 15 ′′ ; that is 40 degrees , 32 minutes , and ...
... DEGREES ; each degree into 60 equal parts , called MINUTES ; each minute into 60 equal parts , called SECONDS ; and so on . Degrees , minutes , and seconds , are thus expressed , 40 ° 32 ′ 15 ′′ ; that is 40 degrees , 32 minutes , and ...
Página 15
... degrees , minutes , & c . as are contained in the arch between the legs . XXIII . ; The arch which measures an angle ... degrees ( the half of 360 ) , all right angles will contain an arch of 90 degrees , equal to the A fourth part of ...
... degrees , minutes , & c . as are contained in the arch between the legs . XXIII . ; The arch which measures an angle ... degrees ( the half of 360 ) , all right angles will contain an arch of 90 degrees , equal to the A fourth part of ...
Página 17
... degrees and minutes , & c . that the arch contains ; hence , supposing the arch D B , which measures the angle D C B , to contain 50 degrees , the lines DE , A B , A C , and E B , will be respectively the sine , tangent , secant , and ...
... degrees and minutes , & c . that the arch contains ; hence , supposing the arch D B , which measures the angle D C B , to contain 50 degrees , the lines DE , A B , A C , and E B , will be respectively the sine , tangent , secant , and ...
Página 25
... Degrees . CASE 1st . When the given angle is right , that is , contains 90 degrees . Draw the line A B , and from the scale take the extent of the chord of 60 degrees in the com- passes ; then set one foot of the compasses in A , and ...
... Degrees . CASE 1st . When the given angle is right , that is , contains 90 degrees . Draw the line A B , and from the scale take the extent of the chord of 60 degrees in the com- passes ; then set one foot of the compasses in A , and ...
Página 26
... degrees ; but when the arch exceeds that quantity , take 90 degrees from the line of chords , and set it off from E to F ; then measure the excess D F , and their sum will give the measure of the angle required . The construction of ...
... degrees ; but when the arch exceeds that quantity , take 90 degrees from the line of chords , and set it off from E to F ; then measure the excess D F , and their sum will give the measure of the angle required . The construction of ...
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Términos y frases comunes
angle Answer Apparent distance Arc second arch azimuth Bearing and Distance Chro chron Co-sec Co-sine Co-tan compass Corr correction corresponding course and distance degrees difference of latitude difference of longitude Dist Ditto East Equation EXAMPLE extent will reach feet given Greenwich mean Half-sum height horizon horizon-glass index error Latitude and Departure latitude by account logarithm LOGARITHMIC SINES meridian altitude middle latitude miles minutes moon Moon's apparent altitude Moon's horizontal parallax Natural Versed Nautical Almanac nonius noon North observed altitude observer's eye parallel perpendicular planet points Porto Santo radius refraction remainder required the latitude required the true right ascension sails Secant seconds sextant ship ship's sine South star subtracted Sun's declination sun's lower limb Sun's right ascension Sun's semidiameter Sun's true altitude Suvers taken Tang tangent true distance true longitude upper limb variation West zenith distance
Pasajes populares
Página 20 - A circle is a plane figure bounded by a curved line called the circumference, every point of which is equally distant from a point within called the center, Fig.
Página 17 - Multiply the index of the quantity by the index of the power to which it is to be raised, and the result will be the power required.
Página 16 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Página 159 - Astronomers, with a view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days in a year. An imaginary Sun, called the mean Sun...
Página 5 - LV. contains the times of high water on the full and change of the moon, with the vertical rise of the tide, at many ports, harbors.
Página 15 - Consequently, when the first three terms of a proportion are given, the fourth is found by multiplying the second and third terms together, and dividing the product by the first term.
Página 231 - ... will be double the altitude of the sun's limb above the horizontal plane ; to the half of which, if the semidiameter, refraction, and parallax be applied, the result will be the true altitude of the centre.
Página 20 - 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.
Página 52 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 37 - ... division. Or the extent from any division to another on the line of meridional parts, applied to the line of equal parts, will give the meridional difference of latitude between the two places denoted by the divisions.