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 páginas |
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Página 13
... suppose unity , or any one thing to be divided 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 divided 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 ...
Página 53
... suppose that to be Ag , which will be contained twice in AB , and three times in BD , the parts Ag , gB , Bh , hi , and iD being all equal , and let the lines gC , hC , and iC , 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 iD being all equal , and let the lines gC , hC , and iC , be drawn : then ( by cor . to theo . 13. ) all the small ...
Página 62
... suppose one triangle be laid on the other , the sides will mutually agree with each other , and therefore be equal ; for if we consider these two triangles are made of the same given three lines , they are manifestly one and the same ...
... suppose one triangle be laid on the other , the sides will mutually agree with each other , and therefore be equal ; for if we consider these two triangles are made of the same given three lines , they are manifestly one and the same ...
Página 72
... suppose of 45 degrees . fig . 50 . fig . 56 . 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 ...
... suppose of 45 degrees . fig . 50 . fig . 56 . 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 ...
Página 91
... by the sine and co - sine . The co - sine taken from the sine added to 90 , or ra- dius , which is 10.00000 , the remainder is the tangent , ( by part 1. theo . 24. ) EXAMPLE . 1. Suppose the tangent of 41 ° . OF LOGARITHMS . 91.
... by the sine and co - sine . The co - sine taken from the sine added to 90 , or ra- dius , which is 10.00000 , the remainder is the tangent , ( by part 1. theo . 24. ) EXAMPLE . 1. Suppose the tangent of 41 ° . OF LOGARITHMS . 91.
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Sin vista previa disponible - 2021 |
Términos y frases comunes
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