Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Page 134
... back again , the plates are drawn down and the paper held tightly . Fig . 1 represents the table with the paper ... sights , is used with the plain - table . This ruler has a fiducial edge , which is in the same vertical plane with ...
... back again , the plates are drawn down and the paper held tightly . Fig . 1 represents the table with the paper ... sights , is used with the plain - table . This ruler has a fiducial edge , which is in the same vertical plane with ...
Page 135
... sights are directed to the first station . If , however , in bringing the table to this position , the corresponding ... back to its place . Let the table be then levelled , after which , place the ruler again on the base line ...
... sights are directed to the first station . If , however , in bringing the table to this position , the corresponding ... back to its place . Let the table be then levelled , after which , place the ruler again on the base line ...
Page 145
... back - sights ; and levels taken in the direction of the other station , fore - sights . Before going on the field with the level , rule three columns , as below , and head them , stations , back - sights , fore - sights . Stations ...
... back - sights ; and levels taken in the direction of the other station , fore - sights . Before going on the field with the level , rule three columns , as below , and head them , stations , back - sights , fore - sights . Stations ...
Page 146
... back - sights , opposite station 2 : sight also to the staff at M , and enter the distance Mf , equal 0 , in the column of fore - sights , opposite station 2 . Let the level be now removed to any other station , as D , and the staff ...
... back - sights , opposite station 2 : sight also to the staff at M , and enter the distance Mf , equal 0 , in the column of fore - sights , opposite station 2 . Let the level be now removed to any other station , as D , and the staff ...
Page 147
... back - sights is less than the sum of the fore - sights , the second station is lower than the first . 177. In this example , we have not regarded the difference between the true and apparent level . If it be necessary to ascertain ...
... back - sights is less than the sum of the fore - sights , the second station is lower than the first . 177. In this example , we have not regarded the difference between the true and apparent level . If it be necessary to ascertain ...
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Common terms and phrases
adjusted angle of elevation axis azimuth back-sights base line called centre clamp-screw coincide column comp compass Cosine D Cosine Sine Cotang course curve degrees determined difference of level direction divided double meridian distance draw east elongation error example feet field notes figure given angle given line given point ground Gunter's chain hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection LatDegDegDegDeg Distance latitude and departure length levelling screws line AC line of collimation logarithm M.
M. Sine marked measure method multiplied natural sines needle object paper parallel passing perpendicular plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side sights similar triangles Sine Sine spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards