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 páginas |
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Página vii
... half departure , to every de- gree 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 . Truths ...
... half departure , to every de- gree 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 . Truths ...
Página 23
... 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 . 23 2. What ...
... 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 . 23 2. What ...
Página 31
... 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 40
... half the arc they stand on , viz . by half the arc AB . fig . 26 . A fig . 26 . Cor . 3. Hence an angle in a segment greater than a semicircle is less than a right angle ; thus AD8 is measured by half the arc AB , but as the arc AB is ...
... half the arc they stand on , viz . by half the arc AB . fig . 26 . A fig . 26 . Cor . 3. Hence an angle in a segment greater than a semicircle is less than a right angle ; thus AD8 is measured by half the arc AB , but as the arc AB is ...
Página 41
... half of a semi- circle 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 perpendicu- lar CD on the chord AB , it will bi- sect it in the point D. fig ...
... half of a semi- circle 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 perpendicu- lar CD on the chord AB , it will bi- sect 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 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