 Astronomers, with a view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days in a year. An imaginary Sun, called the mean Sun...  The heavens [tr. by W. Lockyer] ed. by J.N. Lockyer - Síða 86eftir Amédée Victor Guillemin - 1876Heildartexta - Um bókina
 | 1833 - 634 síður
...day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with the view of obtaining a convenient and uniform measure of time, have recourse to a mean War <Ini/, the length of which is equal to the mean or average of all the apparent solar days... | |
 | 1841 - 630 síður
...day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with the view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
 | 1842 - 624 síður
...day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with the view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
 | 1843 - 634 síður
...day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with the view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
 | 1846 - 646 síður
...day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with the view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
 | 1850 - 668 síður
...body : the length of a day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with a view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
 | Great Britain. Nautical Almanac Office - 1852 - 676 síður
...body : the length of a day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with a view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
 | John William Norie - 1852 - 844 síður
...eccentricity of the earth's orbit, and the obliquity of the ecliptic to the equinoctial, Astronomers, with the view of obtaining a convenient and uniform measure of time, have recourse to what they call a mean solar day, the length of which is equal to the mean, or average, of all the apparent... | |
 | Great Britain. Nautical Almanac Office - 1859 - 572 síður
...body : the length of a day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with a view of obtaining a convenient and uniform measure of time, Lave recourse to a mean solar day, the length of which is equal t^ the mean or average of all the apparent... | |
 | 1860 - 568 síður
...body : the length of a day, as determined by any of these bodies, is therefore a variable quantity. Astronomers, with a view of obtaining a convenient and uniform measure of time, have recourse to a mean solar day, the length of which is equal to the mean or average of all the apparent solar days... | |
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