 | William Chauvenet - Astronomical instruments - 1863 - 764 pages
...found from two altitudes by the simple method proposed by Captain SUMNER, for which see Chapter VUL CHAPTER VII. FINDING THE LONGITUDE BY ASTRONOMICAL...where we have established the general equation L = T, — T (382) in which (Art. 47) T0 and T are the local times (both solar or both sidereal) reckoned... | |
 | William Chauvenet - 1864 - 720 pages
...found from two altitudes by the simple method proposed by Captain SUMNER, for which see Chapter VUL CHAPTER VII. FINDING THE LONGITUDE BY ASTRONOMICAL...45, where we have established the general equation L = T0 — T (382) in which (Art. 47) T0 and T are the local times (both solar or both sidereal) reckoned... | |
 | William Chauvenet - Astronomical instruments - 1874 - 724 pages
...found from two altitudes by th'e simple method proposed by Captain SUMNER, for which see Chapter VHL CHAPTER VII. • FINDING THE LONGITUDE BY ASTRONOMICAL...equation L = T 0 — T (382) in which (Art. 47) T g and T are the local times (both solar or both sidereal) reckoned respectively at the first meridian,... | |
 | William Chauvenet - Astronomical instruments - 1891 - 716 pages
...be found from two altitudes by the simple method proposed by Captain SUMNER, for which see Chapter CHAPTER VII. FINDING THE LONGITUDE BY ASTRONOMICAL...45, where we have established the general equation L=T0—T (382) in which (Art. 47) T0 and T are the local times (both solar or both sidereal) reckoned... | |
 | William Chauvenet - Astronomical instruments - 1891 - 714 pages
...method proposed by Captain SUJINER, for which see Chapter VIIL CHAPTER VII. FINDING THE LONGITUDE BT ASTRONOMICAL OBSERVATIONS. 213. THE longitude of a...45, where we have established the general equation L — T0 — T (382) in which (Art. 47) T0 and T are the local times (both solar or both sidereal) reckoned... | |
 | William Mitchell Gillespie - Surveying - 1897 - 488 pages
...computation with this new value for c obtain a— T — Cc — A a, identical for each group. LONGITUDE. 699. The longitude of a point on the earth's surface is...between the meridian of the point and some assumed meridian called first or initial meridian. The difference in longitude between two points is the angle... | |
 | William Chauvenet - Astronomical instruments - 1900 - 722 pages
...found from two altitudes by the simple method proposed by Captain SUMJJER, for which see Chapter VUl CHAPTER VII. FINDING THE LONGITUDE BY ASTRONOMICAL...meridians. These definitions have been tacitly assumed iu Art. 45, where we have established the general equation L = T0 — T (382) in which (Art. 47) T0... | |
 | International Correspondence Schools - Building - 1906 - 634 pages
...parallel have the same latitude, as the arcs Rr, G' G, F' F are evidently equal. 5. Longitude. — The longitude of a point on the earth's surface is the angle between the meridian plane through that point and another meridian plane assumed as a plane of reference.... | |
 | John Charles Duncan - Astronomy - 1926 - 478 pages
...to the axis. The parallel of latitude that lies midway between the poles is the terrestrial equator. The longitude of a point on the Earth's surface is the angle between the plane of its meridian and the plane of the meridian of some place chosen as a standard... | |
 | Stephen Harriman Long - Navigation - 1927 - 208 pages
...circles of longitude converge through FIO. 117. the poles, and are called meridians of longitude. Thus the longitude of a point on the earth's surface is the angle subtended at the earth's centre by the great circle through that place and by the great circle through... | |
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CHAPTER VII. FINDING THE LONGITUDE BY ASTRONOMICAL OBSERVATIONS. 213. THE longitude of a point on the earth's surface is the angle at the pole included between the meridian of the point and some assumed first meridian. The difference of longitude of any... 
