 | Charles Davies - 1837 - 342 páginas
...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 - 1839 - 376 páginas
...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 - 1839 - 376 páginas
...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 - 1841 - 414 páginas
...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 - 1854 - 446 páginas
...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 - 1868 - 248 páginas
...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 - 1868 - 252 páginas
...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 páginas
...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 - 1871 - 448 páginas
...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 - 1873 - 234 páginas
...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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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... 
