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 2
... suppose unity or any one thing to be di- vided into any assigned number of equal parts , this number is called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a ...
... suppose unity or any one thing to be di- vided into any assigned number of equal parts , this number is called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a ...
Σελίδα 58
... suppose that to be Ag , which will be contained twice in AB , and three times in BD , the parts Ag , gB , Bh , hi , and i D being all equal , and let the lines gC , hC , and i C , be drawn : then ( by cor . to theo . 13. ) all the small ...
... suppose that to be Ag , which will be contained twice in AB , and three times in BD , the parts Ag , gB , Bh , hi , and i D being all equal , and let the lines gC , hC , and i C , be drawn : then ( by cor . to theo . 13. ) all the small ...
Σελίδα 64
... tri- angle BFG , whose side BG = AE , and GF = ED ( by the last ) then also the angle B = A ; if we suppose one triangle be laid on the other , the sides 1 will mutually agree with each other , and therefore 64 GEOMETRICAL.
... tri- angle BFG , whose side BG = AE , and GF = ED ( by the last ) then also the angle B = A ; if we suppose one triangle be laid on the other , the sides 1 will mutually agree with each other , and therefore 64 GEOMETRICAL.
Σελίδα 72
... suppose of 45 degrees . From a scale of chords take 60 degrees , for 60 ° is equal to the radius ( by cor . theo . 15. ) and with that distance from A , as a centre , describe a circle from the line AB ; take 45 degrees , the quantity ...
... suppose of 45 degrees . From a scale of chords take 60 degrees , for 60 ° is equal to the radius ( by cor . theo . 15. ) and with that distance from A , as a centre , describe a circle from the line AB ; take 45 degrees , the quantity ...
Σελίδα 85
... suppose 3. 1. Open the sector to the given radius , and describe the arch as before . 2 . Set off the radius . 3. Set off the chord of 57 de- grees backwards , which will give the arc of three degrees . Given the radius of a circle ...
... suppose 3. 1. Open the sector to the given radius , and describe the arch as before . 2 . Set off the radius . 3. Set off the chord of 57 de- grees backwards , which will give the arc of three degrees . Given the radius of a circle ...
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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