A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles, Wherein Every Thing that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas, Jun. and Joseph Cushing, 1816 - 472 σελίδες |
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Σελίδα 144
... bearings of lines ; which will be par- ticularly shewn , when we come to treat of them . PROB . I. fig . 88 . B Let A and B be two houses on one side of a river , whose distance asunder is 293 perches : there is a tow- er at C on the ...
... bearings of lines ; which will be par- ticularly shewn , when we come to treat of them . PROB . I. fig . 88 . B Let A and B be two houses on one side of a river , whose distance asunder is 293 perches : there is a tow- er at C on the ...
Σελίδα 173
... bearing of the first sta- tionary line AB , let the line be measured , and the length thereof in chains and links be ... bearings and sta- tionary distances . Having done with your first station , set the instrument over the hole or spot ...
... bearing of the first sta- tionary line AB , let the line be measured , and the length thereof in chains and links be ... bearings and sta- tionary distances . Having done with your first station , set the instrument over the hole or spot ...
Σελίδα 175
... and a fore - sight to E ; thus the bearings may be taken quite round , and the stationary distances being annexed to them , will complete the field - book . 1 But in this last method , care must be OF THE CIRCUFERENTOR . 175.
... and a fore - sight to E ; thus the bearings may be taken quite round , and the stationary distances being annexed to them , will complete the field - book . 1 But in this last method , care must be OF THE CIRCUFERENTOR . 175.
Σελίδα 177
... bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contained in the given angle ; but if more , take it from 360 , and the remainder will be the degrees contained in the given ...
... bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contained in the given angle ; but if more , take it from 360 , and the remainder will be the degrees contained in the given ...
Σελίδα 178
... either give the angles of the field , or the bearing of every stationary distance line , from the meridian ; as the circumferentor and quarter- ed compass do . First then , To take the angles of the field 178 OF THE THEODOLITE . OF THE ...
... either give the angles of the field , or the bearing of every stationary distance line , from the meridian ; as the circumferentor and quarter- ed compass do . First then , To take the angles of the field 178 OF THE THEODOLITE . OF THE ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
20 perches 50 Dist ABCD acres altitude annexed Answer base bearing bisect blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column contained cyphers decimal decimal fraction Dep Lat difference divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains given angle half the sum height Hence hypothenuse inches instrument latitude length logarithm magnetical measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM sect semicircle side sights sine square root stationary distance sun's suppose survey taken tance Tang tangent thence theo theodolite THEOREM thro trapezium triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence