 | United States. War Department - 1873 - Страниц: 1262
...by reference to them, but ft is preferable that he should observe directly the altitude and azimuth. Altitudes are expressed by degrees from the horizon to the zenith. If any circle be divided into the 300 parts ami rudiul lines connect these parts with the center, each . pair of lines subtend an... | |
 | United States. Congress. House - 1873 - Страниц: 1004
...reference to them ; but it is preferable that he should observo directly the altitude anil azimuth. Altitudes are expressed by degrees from the horizon to the zenith. If any circle be divided into :!(JU parts, and radial lines connect these parts with the center, each pair of lines subtend an angle... | |
 | United States. Congress. House - 1874 - Страниц: 1302
...circle be divided into the 360 parts and radial lines connect these parts with the center, each pairof lines subtend an angle of one degree ; the fourth part of the circle will subtend ui angle of ninety degrees or one right angle, and the corresponding radii are perpen(licnlar to each... | |
 | United States. War Department - 1879 - Страниц: 1068
...preferable that ho should observe directly the altitude and azimuth. 155. Altitudes are expressed by decrees from the horizon to the zenith. If any circle be divided into three hundred and sixty parts, and thé radial lines connect these parts with the center, each pair of lines subtend an angle of one degree;... | |
 | United States. Army. Signal Corps - 1882 - Страниц: 144
...by reference to them, but it is preferable that he should observe directly the altitude and azimuth. Altitudes are expressed by degrees from the horizon...lines subtend an angle of one degree; the fourth part oí the circle will subtend an angle of ninety degrees or one right angle, and the corresponding radii... | |
 | T. Russell - 2007 - Страниц: 100
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... crown of any arch of light, and the same data for any corona or glory that may be formed. When the observer is familiar with the names of the principal fixed stars... 