 Let the board be placed about one foot in front of the theodolite, a lamp or candle placed on the shelf at its lower edge ; and let the board be slipped up or down, until the pole-star can be seen through the hole. The light reflected from the paper will...  Elements of Surveying: With the Necessary Tables - Page 100by Charles Davies - 1830 - 306 pagesFull view - About this book
 | Charles Davies - Navigation - 1837 - 336 pages
...it, for the purpose of holding a candle. About twenty-five minutes before the time of the greatesl eastern or western elongation of the pole-star, as...is to be observed, and the star has not yet reached the most easterly point, it will move from the line towards the east, and the reverse when the elongation... | |
 | Charles Davies - Surveying - 1839 - 380 pages
...about three inches square, be nailed to the lower edge of it, for the purpose of holding a candle. About twenty-five minutes before the time of the greatest...is to be observed, and the star has not yet reached the most easterly point, it will move from the line towards the east, and the reverse when the elongation... | |
 | Charles Davies - Surveying - 1839 - 376 pages
...about three inches square, be nailed to the lower edge of it, for the purpose of holding a candle. About twenty-five minutes before the time of the greatest...is to be observed, and the star has not yet reached the most easterly point, it will move from the line towards the east, and the reverse when the elongation... | |
 | Charles Davies - Navigation - 1841 - 406 pages
...about three inches square, be nailed to the lower edge of it, for the purpose of holding a candle. About twenty-five minutes before the time of the greatest...is to be observed, and the star has not yet reached the most easterly point, it will move from the line towards the east, and the reverse when the elongation... | |
 | Charles Davies - Navigation - 1854 - 446 pages
...the shelf at its lower edge ; and let the board be slipped up or down, until the pole-star can beseen through the hole. The light reflected from the paper...is to be observed, and the star has not yet reached the most easterly point, it will move from the line towards the east, and the reverse when the elongation... | |
 | J. H. Hawes - Public lands - 1868 - 248 pages
...shown by the tables of elongations, let the theodolite he placed at a convenient point and leveled. Let the board be placed about one foot in front of...is to be observed, and the star has not yet reached the most easterly point, it will move from the line toward the east, and the reverse when the elongation... | |
 | J. H. Hawes - Public lands - 1868 - 252 pages
...on the shelf at its lower edge; and let .the board be slipped up or down, until the pole-star caii be seen through the hole. The light reflected from...is to be observed, and the star has not yet reached the most easterly point, it will move from the line toward the east, and the reverse when the elongation... | |
 | INSTRUCTIONS TO THE SURVEYORS GENERAL OF PUBLIC LANDS OF THE UNITED STATES. - 1871 - 106 pages
...sliown by the tables of elongations, let the theodolite be placed at a convenient point and leveled. Let the board be placed about one foot in front of...is to be observed, and the star has not yet reached the most easterly point, it will move from the line toward the east, and the reverse when the elongation... | |
 | Charles Davies - Surveying - 1871 - 458 pages
...pole-star can be seen through the hole. The light, reflected from the paper, will show the cross-hairs in the telescope of the theodolite. Then, let the...an eastern elongation that is to be observed, and if the star has not yet reached the most easterly point, it will move from the line toward the east,... | |
 | J. H. Hawes - Public lands - 1873 - 234 pages
...shown by the tables of elongations, let the theodolite be placed at a convenient point and leveled. Let the board be placed about one foot in front of...is to be observed, and the star has not yet reached the most easterly point, it will move from the line toward the east, and the reverse when the elongation... | |
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