The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Σελίδα 1
... measuring land , and of delineating its boundaries on a map . The Surveyor , in the practice of this art , directs his attention , at first , to the tracing and measur- ing of lines ; secondly , to the position of these lines in respect ...
... measuring land , and of delineating its boundaries on a map . The Surveyor , in the practice of this art , directs his attention , at first , to the tracing and measur- ing of lines ; secondly , to the position of these lines in respect ...
Σελίδα 39
... measure of the arc . Thus the right line HG , is the mea- sure of the arc HBG , fig . 8 . 18. The segment of a circle is any part there- of , which is cut off by a chord : thus the space- which is comprehended between the chord HG and ...
... measure of the arc . Thus the right line HG , is the mea- sure of the arc HBG , fig . 8 . 18. The segment of a circle is any part there- of , which is cut off by a chord : thus the space- which is comprehended between the chord HG and ...
Σελίδα 41
... the sine of the arc HB , or of its supplement ADH . fig . 8 . 28. The measure of a right - lined angle , is the arc of a circle swept from the angular point , and G contained between the two lines that form the angle thus GEOMETRY . 41.
... the sine of the arc HB , or of its supplement ADH . fig . 8 . 28. The measure of a right - lined angle , is the arc of a circle swept from the angular point , and G contained between the two lines that form the angle thus GEOMETRY . 41.
Σελίδα 42
... measure the arc is thus because the arc HB is the measure of the angle HCB , and since HL is the sine , BK the tangent , and CK the secant , BL the versed sine , HF the co - sine , DI the co - tangent , and CI the co - secant , & c . of ...
... measure the arc is thus because the arc HB is the measure of the angle HCB , and since HL is the sine , BK the tangent , and CK the secant , BL the versed sine , HF the co - sine , DI the co - tangent , and CI the co - secant , & c . of ...
Σελίδα 51
... measured by half the arc it subtends or stands on . Fig . 26 . Cor . 2. Hence all angles at the circumference of a circle which stands on the same chord as AB , are equal to each other , for they are all measured by half the arc they ...
... measured by half the arc it subtends or stands on . Fig . 26 . Cor . 2. Hence all angles at the circumference of a circle which stands on the same chord as AB , are equal to each other , for they are all measured by half the arc they ...
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acres altitude Answer arch base bearing blank line centre chains and links circle circle of latitude circumferentor Co-sec Co-tang column compasses contained decimal Dep Lat Dep difference Dist divided divisions draw east Ecliptic edge EXAMPLE feet field-book figures fore four-pole chains geometrical series given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied Natural Co-sines natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole pole star PROB proportion protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect semicircle Sextant side sights square root station stationary distance subtracted survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry vane versed sine vulgar fraction