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 Cushing & Jewett, J. Robinson printer, 1822 - 326 σελίδες |
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Σελίδα 134
... thence any convenient distance towards the object ; and at the end thereof , take another angle to the top ; and you have the proper requisites , thus ; First station . Second station . Angle to the foot 184 OF HEIGHTS .
... thence any convenient distance towards the object ; and at the end thereof , take another angle to the top ; and you have the proper requisites , thus ; First station . Second station . Angle to the foot 184 OF HEIGHTS .
Σελίδα 135
... station . Second station . Angle to the foot DAB 21 ° 00 ' Angle to the top CAB 35 ° 00 ′ Stationary distance AB 104 feet . Angle to the top 48 ° 30 ' DC required . Geometrically . On an indefinite blank line , lay the stationary dis ...
... station . Second station . Angle to the foot DAB 21 ° 00 ' Angle to the top CAB 35 ° 00 ′ Stationary distance AB 104 feet . Angle to the top 48 ° 30 ' DC required . Geometrically . On an indefinite blank line , lay the stationary dis ...
Σελίδα 136
... station at B , from whence take an angle to the foot , and another to the top of the tree ; measure any convenient ... Second station . Angle to the foot EAD = 24 ° 30 . Angle to the top EAC - 32 ° 00 ' . Let DC and DE be required . The ...
... station at B , from whence take an angle to the foot , and another to the top of the tree ; measure any convenient ... Second station . Angle to the foot EAD = 24 ° 30 . Angle to the top EAC - 32 ° 00 ' . Let DC and DE be required . The ...
Σελίδα 161
... another peg be left , as at e ; the dis- tance from e to f is to be inserted in the field - book , in the second column , under angles , in a line with a station No 2 ; and in the same line , under the title of distances in the third ...
... another peg be left , as at e ; the dis- tance from e to f is to be inserted in the field - book , in the second column , under angles , in a line with a station No 2 ; and in the same line , under the title of distances in the third ...
Σελίδα 164
... second column of radii : the measures of the res- pective lines of the mearing viz . AB , BC , CD , DE , & c . being ... station . If any line of the field be inaccessible , as suppose CD to be , then by way of proof that the distance CD ...
... second column of radii : the measures of the res- pective lines of the mearing viz . AB , BC , CD , DE , & c . being ... station . If any line of the field be inaccessible , as suppose CD to be , then by way of proof that the distance CD ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Συχνά εμφανιζόμενοι όροι και φράσεις
20 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant co-sine Co-tang column compass contained cyphers decimal decimal fraction difference Dist 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 measure meridian distance multiplied needle number of degrees object off-sets opposite parallel parallelogram perpendicular piece of ground plane polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM secant second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken tang tangent thence theo theodolite THEOREM thro triangle ABC trigonometry true amplitude true azimuth two-pole chains vane variation whence