New American Practical NavigatorU.S. Government Printing Office, 1880 |
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Side 10
... radius of half the latitude , increased by 45 ° , taken to seven places of figures , reckoned as integers ; and M is the meridional parts of that latitude in miles . Table IV . contains the declination of the sun , which was compared ...
... radius of half the latitude , increased by 45 ° , taken to seven places of figures , reckoned as integers ; and M is the meridional parts of that latitude in miles . Table IV . contains the declination of the sun , which was compared ...
Side 11
... radius of the earth was called 20911790 feet , which agrees nearly with the mean value given in De La Lande's Astronomy . Table XI . is a common table of proportional parts , the construction of which does not need any explanation ...
... radius of the earth was called 20911790 feet , which agrees nearly with the mean value given in De La Lande's Astronomy . Table XI . is a common table of proportional parts , the construction of which does not need any explanation ...
Side 4
... RADIUS of a circle , or SEMI - DIAMETER , is a right line drawn from the centre to the circumference , as AC ; or it is that line which is taken between the points of the compasses to describe the circle . B RE с A DIAMETER of a circle ...
... RADIUS of a circle , or SEMI - DIAMETER , is a right line drawn from the centre to the circumference , as AC ; or it is that line which is taken between the points of the compasses to describe the circle . B RE с A DIAMETER of a circle ...
Side 6
... Radius Chord Z Costne F Sine Secant Tangent S R Versa Sine The TANGENT of an arc is a right line drawn perpendicular to the diameter , passing through one end of the arc , and terminated by a line drawn from the centre through the other ...
... Radius Chord Z Costne F Sine Secant Tangent S R Versa Sine The TANGENT of an arc is a right line drawn perpendicular to the diameter , passing through one end of the arc , and terminated by a line drawn from the centre through the other ...
Side 12
... radius of the one is to the radius of the other . B F E a Let ABD , abd , be two circles ; BD , bd , two arcs of these circles , equal to one another , or consisting of the same number of degrees ; also FD , fd , the tangents ; BD , bd ...
... radius of the one is to the radius of the other . B F E a Let ABD , abd , be two circles ; BD , bd , two arcs of these circles , equal to one another , or consisting of the same number of degrees ; also FD , fd , the tangents ; BD , bd ...
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American Practical Navigator: An Epitome of Navigation : Originally by ... Uten tilgangsbegrensning - 1962 |
Vanlige uttrykk og setninger
A.M. Hour angle apparent altitude azimuth calculation Cape central altitude centre chronometer column compass Corr correct altitude corresponding Cosecant Cosine course degrees difference of latitude difference of longitude Dist elapsed equal equator error EXAMPLE feet Funchal given Greenwich Half-sum horizon glass horizontal parallax Hour A.M. hour angle hypotenuse instrument Latitude and Departure lee-way line of numbers lower limb lunar observation mean meridian altitude method middle latitude miles minutes moon moon's Nautical Almanac nearly noon object observed altitude parallel perpendicular place of observation Plane Sailing planet points polar distance Prop proportional logarithm refraction remainder rule sea account Secant semidiameter sextant ship side sine star subtract sun's declination sun's right ascension Suppose Table XXVII taken tangent telescope transit traverse table triangle true altitude true distance true longitude variation wires zenith distance
Populære avsnitt
Side 11 - 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.
Side 15 - In any plane triangle, as the sum of the sides about the vertical angle is to their difference, so is the tangent of half the sum of the angles at the base to the tangent of half their difference.
Side 15 - In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. By Theorem II. we have a : b : : sin. A : sin. B.
Side 6 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Side 254 - Emersion (Em.) the instant of its reappearance at coming out of the shadow. They generally happen when the Satellite is apparently at some distance from the body of Jupiter, except near the opposition of Jupiter to the Sun, when the eclipse takes place near to the body of the planet.
Side 7 - In a right triangle, the side opposite the right angle is called the hypotenuse, and the other two sides the legs.
Side 233 - ... distance, to obtain the approximate Greenwich mean time corresponding to the given distance. If the distance between the Moon and a Star increased or decreased uniformly, the Greenwich...
Side 126 - ... to the depth of 80 or 100 fathoms ; then heave the log, and the number of knots run out in half a minute will be the miles the current sets per hour, and the bearing of the log will show the set of it. There is a very remarkable current, called the GULF STREAM, which sets in a north-east direction along the coast of America, from Cape Florida towards the Isle of Sables...
Side 148 - ... placed by the maker equidistant from each other and parallel to the middle one — therefore, when the middle one is adjusted, the others are so too ; he also places the two transverse wires at right angles to the vertical middle wire. These adjustments are always performed by the maker, and but little liable to derangement. When, however, they happen to get out of order, and the observer wishes to correct them, it is done by loosening the screws which hold the eye-end of the telescope in its...
Side 136 - ... to make the objects appear on the other wire ; if the contact still remains perfect, the axis of the telescope is in proper adjustment ; if not, it must be altered by moving the two screws which fasten, to the up-and-down piece, the collar into which the telescope screws. This adjustment is not very liable to be deranged.