 ... and proceed precisely as above described, changing to each pair of screws, successively, until the adjustment is very nearly perfected, when it may be completed over a single pair. The object of this approximate adjustment, is to bring...  Gurley Manual of Surveying Instruments ... - Page 117by Gurley, W. & L. E., Troy, N.Y. - 1871Full view - About this book
 | Aaron Schuyler - Measurement - 1873 - 508 pages
...to the leveling screws beneath. Should the bubble run to either end, bring it halfway back by the Y nuts on either end of the bar. Now move the telescope...of leveling screws, bring the bubble again into the center, and proceed as before, changing to each pair of screws, successively, till the adjustment is... | |
 | Charles Fitzroy Bellows, Francis Hodgman - Surveying - 1886 - 490 pages
...to the leveling-screws beneath. Should the bubble run to either end, bring it half-way back by the Y nuts on either end of the bar; now move the telescope over the other set of leveling-screws, bring the bubble again into the center, and proceed precisely as above described,... | |
 | Daniel Carhart - Surveying - 1888 - 528 pages
...levelling-screws beneath. Should the bubble run to either end, bring it half-way back by the Y-nuts on either end of the bar ; now move the telescope over the other set of levelling-screws, bring the bubble again into the centre, and proceed precisely as above described,... | |
 | Thomas J. Foster - Coal mines and mining - 1891 - 444 pages
...to the leveling screws beneath. Should the bubble run to either end, bring it half way back by the Y nuts on either end of the bar; now move the telescope...changing to each pair of screws, successively, until the adjustmeut is very nearly perfected, when it may be completed over a single pair. The object of this... | |
 | W. & L.E. Gurley - Surveying - 1905 - 462 pages
...telescope over the other set of leveling-screws, bring the bubble again into the middle, and proceed as above described, changing to each pair of screws...this approximate adjustment is to bring the upper plate of the leveling-head into a position as nearly horizontal as possible, in order that no essential... | |
 | J. C. Sala - 1896 - 176 pages
...to the leveling screws beneath. Should the bubble run to either end, bring it halfway back by the Y nuts on either end of the bar; now move the telescope...of leveling screws, bring the bubble again into the center and proceed precisely as previously described, changing to each pair of screws, successively,... | |
 | W. & L.E. Gurley - Surveying - 1908 - 484 pages
...telescope over the other pair of leveling-screws, bring the bubble again into the middle, and proceed as above described, changing to each pair of screws...this approximate adjustment is to bring the upper plate of the leveling-head into a position as nearly horizontal as possible, in order that no essential... | |
 | Thomas J. Foster - Coal mines and mining - 1916 - 1230 pages
...to the leveling screws beneath. Should the bubble run to either end, bring it half way back by the V nuts on either end of the bar; now move the telescope...of leveling screws, bring the bubble again into the center, and proceed precisely as just described, changing to each pair of screws, successively, until... | |
 | Edward Nathan Zern - Coal mines and mining - 1928 - 1290 pages
...respect to the leveling sere beneath. Should the bubble run to either end, bring it half way back by t Y nuts on either end of the bar; now move the telescope over the other set leveling screws, bring the bubble again into the center, and proceed precise as just described, changing... | |
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