 | John Hamilton Moore - 1810 - 662 페이지
...requisite, be made. For correcting the index error, see the rules for adjusting Hadley's Quadrant. To set the Axis of the Telescope parallel to the Plane of the Sextant. In measuring angular distances, the line of sight, or axis of the telescope, should be parallel to... | |
 | George Adams - 1813 - 576 페이지
...the images will pass exactly over each other, and the mirror will then be adjusted in this direction, To set the axis of the telescope parallel to the plane of the sextant. We have already observed, that in measuring angular distances, the line of sight, or plane of observation,... | |
 | 1821 - 708 페이지
...be considered as a constant quantity to be applied to all angles measured with the same instrument. To set the axis of the telescope parallel to the plane of the Sextant. In measuring angular distances, the line of sight, or axis of the telescope, should be parallel to... | |
 | Denison Olmsted - 1839 - 504 페이지
...This adjustment should be repeated alternately with the last till both are as perfect as may be. (4.) To set the axis of the telescope parallel to the plane of the sextant. — There are two parallel wires on opposite sides and equidistant from the centre of the field of... | |
 | Nathaniel Bowditch - 1846 - 854 페이지
...be considered as a constant quantity to be applied to all angles measured with the same instrument. To set the. axis of the telescope parallel to the plane of the. fntant. In measuring angular distance», the line of sight, or axis of the telescope, must to parallel... | |
 | Janet Taylor - 1851 - 674 페이지
...to be made alternately with the right and left limbs of the latter, in the manner already explained. To set the axis of the telescope parallel to the plane of the sextant. Having screwed on the telescope, turn the tube containing the eyeglass till two of the wires are parallel... | |
 | John William Norie - 1852 - 844 페이지
...instrument, and their planes parallel to each other when the index-division is at 0 on the arch ; also, to set the axis of the telescope parallel to the plane of the instrument: each of these particulars must be examined before an observation is taken, and the adjustments,... | |
 | Reed Thomas and co, ltd - 1863 - 154 페이지
...error in this adjustment,) or may be measured as directed before, and applied to all observations. 4th. To set the axis of the Telescope parallel to the plane of the Sextant. Screw in the Inverting Telescope, and set a pair of its wires parallel to the Sextant-plane ; select... | |
 | Janet Taylor - 1865 - 184 페이지
...telescope or sight vane, to the horizon, and if the reflected and true horizons form one continous line, the horizon glass is parallel with the index...moon and star, which are more than 90° distant from eax;h other, bring them into contact on the wire nearest to the instrument; then by slightly moving... | |
 | William Culley Bergen - 1872 - 688 페이지
...Object ... ... 223 144 By the Horizon ... ... ... ... 223 145 By the Sun ... ... ... ... ... 223 146 To set the Axis of the Telescope parallel to the Plane of the Sextant ... ... ... ... 223 147 Remarks ... ... ... ... ... 224 148 To find the Index Error. By the Horizon... | |
| |
... to set the axis of the telescope parallel to the plane of the instrument... 
