 | Thomas Baker - 1850 - 244 sider
...screw C ; and the vertical limb can then be moved through a small space by the slow -motion screw t. Before commencing observations with this instrument,...attended to : — 1. Adjustments of the telescope for parallax and collimation. 2. Adjustment of the horizontal limb for setting the levels on the horizontal... | |
 | John Fry Heather - 1859 - 198 sider
...screw, c, and the vertical limb can then be moved through a small space by a slow-motion screw, *. Before commencing observations with this instrument,...the levels on the horizontal limb to indicate the vnrticality of the azimuthal axis. describe presently the adjustments of the instrument, we shall explain... | |
 | John Fry Heather - 1874 - 220 sider
...by a capstan-headed screw as in the Y level. The horizontal axis can be fixed by a clamping screw, and the vertical limb can then be moved through a...horizontal limb to indicate the verticality of the uzimuthal axis. , THE THEODOLITE. 125 beneath the telescope to indicate the horizontally of the line... | |
 | Edward Spon - 1874 - 460 sider
...vertical limb can then be moved through a small врасе by a slowmotion screw N. Adjustments. — Before commencing observations with this instrument, the following adjustments must be attended to ; — Adjustments of the telescope, which comprise the ndjustmcnt for parallax and for coll ¡motion.... | |
 | Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - 1874 - 460 sider
...the vertical limb can thtn be moved through a small space by a slowmotion screw N. Adjustments. — Before commencing observations with this instrument, the following adjustments must be attended to ; — Adjustments of the t, lescope, which comprise the adjustment for parallax and for collimation.... | |
 | William James Lloyd Wharton - 1882 - 416 sider
...adjustments are— 1. Adjustments of the telescope, viz., for parallax and for collimation. 2. Adjustment of horizontal limb, viz., to set the levels on the horizontal...to indicate the verticality of the azimuthal axis. Commence operations by setting up the theodolite as level as you can by eye, by moving the legs. See... | |
 | John Fry Heather - 1884 - 566 sider
...the instrument, we shall explain the method of detecting an inaccuracy in the grinding of the axes. Before commencing observations with this instrument,...the telescope, viz. : the adjustment for parallax ; the adjustment for collimation. 2. Adjustment of the horizontal limb, viz. : to set the levels on... | |
 | John Fry Heather - 1891 - 260 sider
...the instrument, wa shall explain the method of detecting an inaccuracy in the grinding of the axes. Before commencing observations with this instrument,...the telescope, viz. : the adjustment for parallax ; the adjustment for collimation. 2. Adjustment of the horizontal limb, viz. : to set the levels on... | |
 | Thomas Baker - 1891 - 262 sider
...screw C; and the vertical limb can then be moved through a small space by the slow-motion screw t. Before commencing observations with this instrument,...be attended to: — 1. Adjustments of the telescope fur oarnllax and collimation. 2. Adjustments of the horizontal hmo Jor setting me levels on the horizontal... | |
 | William James Lloyd Wharton - 1898 - 410 sider
...adjustments are — 1. Adjustments of the telescope, viz., for parallax and for collimation. 2. Adjustment of horizontal limb, viz., to set the levels on the horizontal limb to indicate the verticality of the azirnu• thal axis. 3. Adjustment of the vertical limb, viz., to set the level beneath the telescope... | |
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Adjustments of the telescope : viz., the adjustment for parallax. for collimation. 2. Adjustment of the horizontal limb : viz., to set the levels on the horizontal limb to indicate the verticality of the azimuthal axis. 