# The American Practical Navigator: Being an Epitome of Navigation and Nautical Astronomy

U.S. Government Printing Office, 1888 - 647 σελίδες
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### Περιεχόμενα

 THE SAILINGSContinued 43 SMJ4858827 N BEKA PARIZI 54 NAVIGATING THE SHIP 61 Principle of the Sextant 69 Circle of Reflection 75 129 77 Stowage and Transportation 81 CONVERSION OF TIME 89 HOUR ANGLEContinued 93 FINDING THE TIME 101 456 102 By Meridian Altitude 274 III 111 38 112 LONGITUDE 127 SUMNERS METHOD 142
 2729 243 Meridional Parts or Increased Latitudes 260 II 272 167 168 279 61 286 66 296 Defining Hour Angle 324 181 346 6996 358 182 392 317 394 643 400 K K K KKA KRANER R888 D D D D D D X X X X X XXX 412 83 525

### Δημοφιλή αποσπάσματα

Σελίδα 635 - 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 636 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Σελίδα 142 - Irish coast a lee shore; the ship was then kept close to the wind and several tacks made to preserve her position as nearly as possible until daylight, when, nothing being in sight, she was kept on ENE under short sail with heavy gales. At about 10 am an altitude of the Sun was observed and the chronometer time noted; but, having run so far without...
Σελίδα 627 - To find the logarithm of a vulgar fraction. RULE. Subtract the logarithm of the denominator from the logarithm of the numerator...
Σελίδα 632 - The circumference of a circle is supposed to be divided into 360 equal parts called degrees, and each degree into 60 equal parts called minutes, and each minute into 60 equal parts called seconds, &c.
Σελίδα 632 - A sphere is a solid bounded by a surface, every point of which is equally distant from a fixed point called the centre.
Σελίδα 632 - 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.
Σελίδα 133 - Greenwich mean time, beginning at noon ; the dates are therefore astronomical. All the distances that can be observed on the same day are grouped together under that date ; and the columns are read from left to right, across both pages of the same opening. The letter W., or E., is affixed to the name of the sun, plauet, or star, to indicate that it is on the west, or east, side of the moon.
Σελίδα 626 - ... the difference between this logarithm and the next greater, and multiply it by the given number exclusive of the four first figures ; cross off at the right hand of the product as many figures as you had figures of the given number to multiply by ; then add the remaining left-hand figures of this product to the logarithm taken from the table, and to the sum prefix an index equal to one lese than the number of integral figures in the given number, and you will have the sought logarithm.
Σελίδα 142 - ... altitude must have happened at all the three points and at Small's light, and at the ship, at the same instant of time ; and it followed, that Small's light must bear ENE, if the Chronometer was right. Having been convinced of this truth, the ship was kept on her course. ENE, the wind being still SE, and in less than an hour, Small's light was made bearing ENE }^E., and close aboard.