New American Practical NavigatorU.S. Government Printing Office, 1880 |
Inni boken
Resultat 1-5 av 100
Side 4
... on longitude , supposing the annual precession 50.35 , and the secular equation as in his table . tude , R he reduction of latitude ; then log Table XXXVIII . was calculated by this rule : Suppose to be the lau PREFACE.
... on longitude , supposing the annual precession 50.35 , and the secular equation as in his table . tude , R he reduction of latitude ; then log Table XXXVIII . was calculated by this rule : Suppose to be the lau PREFACE.
Side 5
... suppose the sum of these three parts to be S seconds , and the moon's horizontal semi - diameter to be D minutes , Part IV . corresponding to S and D , will be SX ( D + 16 ) ( D - 16 ) . 256 Table XLV . The arguments at the side being B ...
... suppose the sum of these three parts to be S seconds , and the moon's horizontal semi - diameter to be D minutes , Part IV . corresponding to S and D , will be SX ( D + 16 ) ( D - 16 ) . 256 Table XLV . The arguments at the side being B ...
Side 7
... ( suppose at G ) , and so form the triangle EGF , one of whose sides , GE , being produced to A , the exterior angle , AEF , must ( by the preceding article ) be equal to the sum of the two angles EFG and EGF ; but by supposition it is ...
... ( suppose at G ) , and so form the triangle EGF , one of whose sides , GE , being produced to A , the exterior angle , AEF , must ( by the preceding article ) be equal to the sum of the two angles EFG and EGF ; but by supposition it is ...
Side 20
... suppose the number 22 were required ; the first figure 2 is to be found on the scale , and for the second figure 2 , count 2 tenths onwards , and that is the point representing 22 . Again , suppose 1728 were required ; for the first ...
... suppose the number 22 were required ; the first figure 2 is to be found on the scale , and for the second figure 2 , count 2 tenths onwards , and that is the point representing 22 . Again , suppose 1728 were required ; for the first ...
Side 21
... Suppose , for example , it were required to find the product of 16 multiplied by 4 ; extend from 1 to 4 ; that extent will reach from 16 to 64 , the product required . Division being the reverse of multiplication , therefore extend from ...
... Suppose , for example , it were required to find the product of 16 multiplied by 4 ; extend from 1 to 4 ; that extent will reach from 16 to 64 , the product required . Division being the reverse of multiplication , therefore extend from ...
Innhold
1 | |
4 | |
7 | |
13 | |
18 | |
25 | |
31 | |
37 | |
193 | |
200 | |
208 | |
215 | |
221 | |
230 | |
243 | |
249 | |
45 | |
51 | |
59 | |
66 | |
79 | |
87 | |
97 | |
103 | |
109 | |
115 | |
122 | |
128 | |
134 | |
138 | |
145 | |
151 | |
155 | |
159 | |
166 | |
171 | |
185 | |
265 | |
275 | |
89 | |
97 | |
131 | |
144 | |
169 | |
230 | |
243 | |
336 | |
385 | |
395 | |
402 | |
410 | |
417 | |
425 | |
433 | |
439 | |
447 | |
468 | |
Andre utgaver - Vis alle
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.