 | Education - 1912 - 632 pages
...Solar day: mean solar lime. The rotation of the earth provides a means by which time is measured. The solar day is the interval between two successive passages of the sun across a given meridian. The earth moves forward in its orbit about one degree a day, but in order to have... | |
 | Albert Irvin Frye - Civil engineering - 1913 - 1698 pages
...day is our common day of twenty-four hours. Any particular solar day is an apparent solar day, and is the interval between two successive passages of the sun across the same meridian. A mean solar day is the average length of the solar days in a tropical year. A tropical... | |
 | Charles George Herbermann - Catholic Church - 1913 - 878 pages
...and stars as if they were real, and not occasioned by the rotation and revolution of the earth. The Day is the interval between two successive passages of the sun across the meridian of any place. It is commonly computed from the midnight passage across the inferior meridian on the opposite side... | |
 | William D. Henderson - Physics - 1916 - 224 pages
...gram 8. Unit of Time. — The unit of time is the second. A second is 1/86,400 of a mean solar day. A solar day is the interval between two successive passages of the sun across a given meridian. Solar days vary in length throughout the year. A mean solar day is the average length... | |
 | Alexander Philip - Calendar - 1921 - 128 pages
...known that the length of the sidereal day has been invariable for at least two thousand years. The solar day is the interval between two successive passages of the sun across the meridian. As the earth's rate of rotation is constant, it follows that the length of the mean solar day is also... | |
 | William D. Henderson - Physics - 1921 - 590 pages
...1/1000 gram 9. Unit of Time. The unit of time is the second. A second is l/86,400of a mean solar day. A solar day is the interval between two successive passages of the sun across a given meridian. Solar days vary in length throughout the year. A mean solar day is the average length... | |
 | 124 pages
...known that the length of the sidereal day has been invariable for at least two thousand years. The solar day is the interval between two successive passages of the sun across the meridian. As the earth's rate of rotation is constant, it follows that the length of the mean solar day is also... | |
 | Sir Robert Stawell Ball - Astronomy - 1909 - 274 pages
...life for we must regulate our hours by the Sun. It might therefore seem natural to take as our day the interval between two successive passages of the Sun across the meridian. This interval is however not a constant one, but if we take a very great number of such intervals between... | |
 | Edward Cornelius Toune, Graeme Mercer Adam - 1895 - 120 pages
...day is not, as is commonly supposed, the time required by the earth to make one turn on its axis, but the interval between two successive passages of the sun across the meridian — that is to say, the time which elapses after the sun is seen exactly south at noon before it is... | |
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A solar day is the interval between two successive passages of the sun across the meridian of any place. 
