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" P; which done, reverse the telescope in its Y's, that is, turn it end for end, which must be done carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right; but if it retires... "
A Treatise on Surveying and Civil Engineering, Wherein Everything that is ... - Page 24
by P. O'Shaughnessy (Civil engineer) - 1848 - 98 pages
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A treatise on the principal mathematical instruments employed in surveying ...

Frederick Walter Simms - 1834 - 124 pages
...carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right; but if it...which elevates or depresses that end of the level, and the other half by the tangentscrew, P; this process must be repeated until the adjustment is perfect...
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A treatise on the principal mathematical instruments employed in surveying ...

Frederick Walter Simms - 1834 - 134 pages
...carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right; but if it...retires to one end, bring it back one half, by the screw f, which elevates or depresses that end of the level, and the other half by the tangentscrew, P; this...
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A Treatise on the Principal Mathematical Instruments Employed in Surveying ...

Frederick Walter Simms - 1836 - 160 pages
...instead of a vertical one. turb the vertical arc, and if the bubble resume its former situation hi the middle of the tube, all is right ; but if it retires...which elevates or depresses that end of the level, and the other half by the tangent-screw, P : this process must be repeated until the adjustment is...
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A Treatise on Military Surveying: Including Sketching in the Field, Plan ...

Basil Jackson - 1847 - 412 pages
...carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation, in the middle of the tube, all is right ; but if it retire to one end, bring it back one half by the screw, B., which elevates or depresses that end of...
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Pike's Illustrated Descriptive Catalogue of Optical, Mathematical, and ...

Benjamin Pike - 1848 - 356 pages
...carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right ; but if it...which elevates or depresses that end of the level, and the other half by the tangent-screw, P ; this process must be repeated until the adjustment is...
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Pike's Illustrated Descriptive Catalogue of Optical, Mathematical and ...

Benjamin Pike (Jr.) - 1848 - 484 pages
...carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right ; but if it...which elevates or depresses that end of the level, and the other half by the tangent-screw, P ; this process must be repeated until the adjustment is...
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A Treatise on the Principal Mathematical Instruments Employed in Surveying ...

Frederick Walter Simms - 1850 - 182 pages
...done carefully that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right ; but if it retire to one end, bring it back one half, by the screw f, which elevates or depresses that end of...
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A Manual of Surveying for India, Detailing the Mode of Operations on the ...

Ralph Smyth, Sir Henry Edward Landor Thuillier - 1851 - 828 pages
...carefully, that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube) all is right ; but if it retires to one end, bring it back onehalf, by the screw, f, which elevates or depresses that end of the level, and the other half by...
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Land and marine surveying

William Davis Haskoll - 1868 - 248 pages
...done carefully that it may not disturb the vertical arc, and if the bubble resume its former situation in the middle of the tube, all is right ; but if it retires to one end, bring it back onehalf, by the screw, which elevates or depresses that end of the level, and the other half by the...
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Land and Marine Surveying in Reference to the Preparation of Plans for Roads ...

William Davis Haskoll - 1886 - 354 pages
...carefully that it may not disturb the vertical arc, and if the bubble resume it's former situation in the middle of the tube, all is right ; but if it retires to one end, bring it back one-half, by the screw, which elevates or depresses that end of the level, and the other half by the...
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