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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... "
A Treatise on Mathematical Instruments: Including Most of the Instruments ... - Page 125
by John Fry Heather - 1859 - 170 pages
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A Rudimentary Treatise on Land and Enigineering Surveying with All the ...

Thomas Baker - 1850 - 244 pages
...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...
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A Treatise on Mathematical Instruments: Including Most of the Instruments ...

John Fry Heather - 1851 - 208 pages
...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...
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Cyclopędia of useful arts & manufactures, ed. by C. Tomlinson. 9 divs, Volume 8

Cyclopaedia - 1852 - 258 pages
...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...
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Treatise on Mathematical Instruments: Their Construction, Adjustment ...

John Fry Heather - 1866 - 228 pages
...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...
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A Treatise on Mathematical Instruments: Their Construction, Adjustment ...

John Fry Heather - 1874 - 220 pages
...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...
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Spons' dictionary of engineering, ed. by O. Byrne (and Spon). 8 div, Volume 87

Spon E. & F.N., ltd - 1874 - 464 pages
...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...
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Spons' Dictionary of Engineering, Civil, Mechanical, Military, and ..., Volume 2

Edward Spon - 1874 - 460 pages
...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...
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Spons' Dictionary of Engineering, Civil, Mechanical, Military, and ..., Volume 8

Edward Spon, Oliver Byrne, Ernest Spon, Francis N. Spon - 1874 - 460 pages
...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...
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Hydrographical Surveying: A Description of Means and Methods Employed in ...

William James Lloyd Wharton - 1882 - 416 pages
...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,...
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Mathematical Instruments: Their Construction, Adjustment, Testing and Use ...

John Fry Heather - 1884 - 566 pages
...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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