 | James Mitchell - 1823 - 666 pages
...determined. DATUM, the singular of data. DAY, in Astronomy t is that portion of time which elapses between two successive transits of the sun over the same meridian ; and the hours are counted from one period to another, from one to twentyfour. Mean Solar DAY. The solar day... | |
 | Janet Taylor - 1842 - 588 pages
...adapted to nautical practice. ON FINDING THE LONGITUDE, BY OBSERVATION. lT has been already remarked that the interval of time between two successive transits of the sun over the meridian of any place, is called a natural day, bcing in fact the time in which, by the rotation of... | |
 | Olinthus Gregory - 1848 - 572 pages
...Common Year. Leap Year. Julian Year. Solar Year. Sidereal Year. A solar day is the time that elapses between two successive transits of the sun over the same meridian, and is not alwavs of equal duration, being longer at some seasons of the vear than at others; the difference... | |
 | Edward Charles Frome - 1850 - 292 pages
...purposes are the apparent solar, mean solar, and sidereal day. The apparent solar day is the interval between two successive transits of the sun over the same meridian ; and from the path of the sun lying in the ecliptic inclined at an angle to the equator upon the poles of... | |
 | William Schmolz - 1859 - 196 pages
...over the upper meridian, and ending with its return to the same meridian. Solar Time. — Solar Time is measured by the daily motion of the sun. A Solar...transits of the sun over the same meridian ; and the hour angle of the sun is called Solar Time, This is the most natural and direct measure of time. But... | |
 | Charles Joyce White - 1872 - 300 pages
...towards the west, which the rotation of the earth gives to all celestial bodies and points. A sidereal day is the interval of time between two successive transits of the vernal equinox over the same branch of the meridian. A solar day is the interval between two similar... | |
 | Alfred Wilks Drayson - 1874 - 346 pages
...meridian during this revolution, the star will be brought on once oftener. We define a solar day as the interval of time between two successive transits of the sun over the same meridian, and a siderial day as the interval between two successive transits of a star over the same meridian, and... | |
 | Simon Newcomb, Edward Singleton Holden - 1881 - 596 pages
...was zero. We thus have to recognize two slightly different kinds of days : solar days and mean days. A solar day is the interval of time between two successive transits of the sun over the same meridian, while a mean day is the mean of all the solar days in a year. If we had two clocks, the one going with... | |
 | Nathan Newby - 1884 - 206 pages
...is called time. The Primary Unit. The average solar day is taken as the primary unit of time. (1.) A Solar day is the interval of time between two successive transits of the vertical rays of the sun across a given meridian. This interval varies at different times. (2.) The... | |
 | Titbits - 1884 - 378 pages
...to the next, is twelve hours twenty-four minutes, very nearly, or just, half a " lunar" day. A lunar day is the interval of time between two successive transits of the moon across the meridian. 196. — Whence arose the expression " bine stocking" ? A blue-stocking really... | |
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A Solar Day is the interval of time between two successive transits of the sun over the same meridian ; and the hour-angle of the sun is called Solar Time. 
