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" To make the bubble line and the bottom element of the rings parallel. — Make the element level with the foot screws and bring the bubble to the middle by means of the altitude adjusting screws. The element is made level by the method of reversions as... "
Surveying Manual ; a Surveying - Page 73
by William David Pence - 1915 - 388 pages
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The Field Engineer: A Handy Book of Practice in the Survey, Location, and ...

William Findlay Shunk - Railroad engineering - 1890 - 360 pages
...level into the same vertical plane. 6. Next, the bubble being at the middle of its tube, carefully lift the telescope out of the wyes, turn it end for end, and replace it. If the bubble settles away from the middle, bring it half-way back by means of the capstan-heads,...
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A Manual of Field and Office Methods for the Use of Students in Surveying

William David Pence, Milo Smith Ketchum - Surveying - 1901 - 272 pages
...bottom element of the rings parallel. — Make the element level with the foot screws and bring tlhe bubble to the middle by means of the altitude adjusting...telescope out of the wyes, turn it end for end, and very gently replace it in the wyes; if the bubble moves, bring it half way back by means of the foot screws....
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A Manual of Field and Office Methods for the Use of Students in Surveying

William David Pence, Milo Smith Ketchum - Surveying - 1904 - 284 pages
...Altitude Screws. — To make the bubble line and the bottom element of the rings parallel. — Make the element level with the foot screws and bring the...telescope out of the wyes, turn it end for end, and very gently replace it in the wyes; if the bubble moves, bring it half way back by means of the foot screws....
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A Manual of Field and Office Methods for the Use of Students in Surveying

William David Pence, Milo Smith Ketchum - Surveying - 1904 - 294 pages
...Altitude Screws. — To make the bubble line and the bottom element of the rings parallel. — Make the element level with the foot screws and bring the...telescope out of the wyes, turn it end for end, and verg gentlg replace it in the wyes; if the bubble moves, bring it half way back by means of the foot...
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The Principles and Practice of Surveying, Volume 1

Charles Blaney Breed, George Leonard Hosmer - Surveying - 1906 - 566 pages
...clamp the instrument (over a pair of leveling screws), then bring the bubble to the center of the tube, lift the telescope out of the wyes, turn it end for end and set it down in the wyes, the eye end now being where the objective was originally. (See Fig. 46.) This...
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The Principles and Practice of Surveying

Charles Blaney Breed, George Leonard Hosmer - Surveying - 1906 - 564 pages
...clamp the instrument (over a pair of leveling screws), then bring the bubble to the center of the tube, lift the telescope out of the wyes, turn it end for end and set it down in the wyes, the eye end now being where the objective was originally. (See Fig. 46.) This...
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Leveling ; Circular Curves ; Stadia and Plane-table Surveying ; Topographic ...

Astronomy - 1907 - 710 pages
...without first correcting any lateral error that may exist. Second. — Center the bubble accurately, take the telescope out of the wyes, turn it end for end, and replace it in the wyes very carefully so as not to disturb their position. If the bubble remains in...
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The Field Engineer: A Handy Book of Practice in the Survey, Location, and ...

William Findlay Shunk - Railroad engineering - 1908 - 388 pages
...level into the same vertical plane. 0. Next, the bubble being at the middle of its tube, carefully lift the telescope out of the wyes, turn it end for end, and replace it. If the bubble sitles away from the middle, bring it half-way back by means of the capstan-heads,...
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A Manual of Field and Office Methods for the Use of Students in Surveying

William David Pence, Milo Smith Ketchum - Surveying - 1914 - 282 pages
...Altitude Screws. — To make the bubble line and the bottom element of the rings parallel. — Make the element level with the foot screws and bring the bubble to the middle by meansf of the altitude adjusting screws. The element is made level by the method of reversions as follows:...
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The Civil Engineer's Handbook: A Convenient Reference Book for Chainmen ...

International Correspondence Schools - Civil engineering - 1913 - 456 pages
...revolution of the telescope. To adjust the level tube vertically, center the bubble accurately, take the telescope out of the wyes, turn it end for end, and replace it in the wyes very carefully so as not to disturb their position. If the bubble remains in...
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