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 xi
... half departure , to every degree and quarter of a degree of the quadrant , the stationary distance being one chain ; which will be found as ready , by a little practice , and perhaps more exact , than those already published . Truth ...
... half departure , to every degree and quarter of a degree of the quadrant , the stationary distance being one chain ; which will be found as ready , by a little practice , and perhaps more exact , than those already published . Truth ...
Página 27
... half the number of decimals that we have in the square . Thus , Root . 3857.300000 ( 62.107 Answer . 36 122 ) 257 244 1241 ) 1330 1241 124207 ) 890000 869449 If to the square of this root we add the .20551 THE SQUARE ROOT 27 2. What is ...
... half the number of decimals that we have in the square . Thus , Root . 3857.300000 ( 62.107 Answer . 36 122 ) 257 244 1241 ) 1330 1241 124207 ) 890000 869449 If to the square of this root we add the .20551 THE SQUARE ROOT 27 2. What is ...
Página 35
... half , third , fourth , & c . part . Note . Though these postulates are not always quoted , the reader will easily perceive where , and in what sense they are to be understood . AXIOMS OR SELF - EVIDENT TRUTHS . 1. Things that are equal ...
... half , third , fourth , & c . part . Note . Though these postulates are not always quoted , the reader will easily perceive where , and in what sense they are to be understood . AXIOMS OR SELF - EVIDENT TRUTHS . 1. Things that are equal ...
Página 44
... half the arc they stand on , viz . by half the arc AB . fig . 26 . 1 A fig . 26 . Cor . 3. Hence an angle in a segment greater than a semicircle is less than a right angle ; thus ADB is mea- sured by half the arc AB , but as the arc AB ...
... half the arc they stand on , viz . by half the arc AB . fig . 26 . 1 A fig . 26 . Cor . 3. Hence an angle in a segment greater than a semicircle is less than a right angle ; thus ADB is mea- sured by half the arc AB , but as the arc AB ...
Página 45
... half of a se- micircle AED , and therefore a right angle . fig . 28 . Fig . 28 . E THEOREM VIII . If from the centre C of a circle ABE , there be let fall the perpen- dicular CD on the chord AB , it will bisect it in the point D. fig ...
... half of a se- micircle AED , and therefore a right angle . fig . 28 . Fig . 28 . E THEOREM VIII . If from the centre C of a circle ABE , there be let fall the perpen- dicular CD on the chord AB , it will bisect it in the point D. fig ...
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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