 | Thomas Baker - 1850 - 244 sider
...plate is turned completely round, shewing that the internal axis, about which it turns, is completely vertical. The bubbles of the levels on the vernier plate being now, therefore, brought to the centres of their tubes, will be adjusted, and also shew the axis to be vertical. Now, having clamped... | |
 | John Fry Heather - 1851 - 208 sider
...plate, turn it round till the telescope is over two of the parallel plate-screws. Bring the bubble, 6, of the level, ss, beneath the telescope to the center...while the vernier plate is turned completely round, snowing that the internal azimuthal axis about which it turns is truly vertical. The bubbles of the... | |
 | Cyclopaedia - 1852 - 258 sider
...telescope is over the other pair of parallel plate screws, the bubble is to be again brought to the centre of its run by turning these screws. The bubble will...plate is turned completely round, showing that the interior azimutbal axis about which it turns is truly vertical. The bubbles of the levels BB being... | |
 | John Fry Heather - 1866 - 228 sider
...screws ; and, if the bubble of the level be not still in the center of its run, bring it back to tho center, half way by turning the parallel plate screws...while the vernier plate is turned completely round, snowing that the internal azimuthal axis about which it turns is truly vertical. The bubbles of the... | |
 | John Fry Heather - 1874 - 220 sider
...parallel plate screws over which it is placed, and half way by turning the tangent screw, i. Kepeat this operation till the bubble remains accurately...will now retain its position while the vernier plate i? turned completely round, snowing that the internal azimuthal axis about which it turns is truly... | |
 | Spon E. & F.N., ltd - 1874 - 464 sider
...the telescope is over the other pair of parallel plate screws, bring the bubble again to the centre of its run by turning these screws. The bubble will now retain its position while the vernier-plate is turned completely round, showing that the internal azimuthal axis about which it turns... | |
 | Edward Spon - 1874 - 460 sider
...the telescope is over the other pair of parallel plat« screws, bring the bubble again to the centre of its run by turning these screws. The bubble will now retain its position while the vernier-plate is turned completely round, showing that the internal azimuthal axis about which it turns... | |
 | Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - 1874 - 460 sider
...tho telescope is over the other pair of parallel plate screws, bring the bubble again to tho centre of its run by turning these screws. The bubble will now retain its position while the vernier-plate is turned completely round, showing that the internal azimuthal axis about which it turns... | |
 | William James Lloyd Wharton - 1882 - 416 sider
...the telescope is over the other pair of parallel plate screws, bring the bubble again to the centre of its run by turning these screws. The bubble will...vernier plate being now, therefore, brought to the centre of their tubes, will be adjusted, to show the verticality of the internal azimuthal axis. Now,... | |
 | John Fry Heather - 1884 - 566 sider
...the telescope is over the other pair of parallel plate screws, bring the bubble again to the centre of its run by turning these screws. The bubble will...vernier plate being now, therefore, brought to the centres of their tubes, will be adjusted, to show the verticality of the internal azimuthal axis. Now,... | |
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... of its run by turning these screws. The bubble will now retain its position while the vernier plate is turned completely round, showing that the internal azimuthal axis about which it turns is truly vertical. The bubbles of the levels on the vernier... 
