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 σελίδες |
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Σελίδα 10
... proportion : for and 100 % which in the decimal form we denote by .3 .03 and .003 , are fractions , of which the first is ten times greater than the second ; and the second ten times greater than the third . 1000 03 Hence it appears ...
... proportion : for and 100 % which in the decimal form we denote by .3 .03 and .003 , are fractions , of which the first is ten times greater than the second ; and the second ten times greater than the third . 1000 03 Hence it appears ...
Σελίδα 30
... sides a hexagon , & c . but if their sides are not equal to each other , then they are called irregular polygons ; as an irregular pentagon , hexagon , & c . 36. Four quantities are said to be in proportion when 30 GEOMETRY .
... sides a hexagon , & c . but if their sides are not equal to each other , then they are called irregular polygons ; as an irregular pentagon , hexagon , & c . 36. Four quantities are said to be in proportion when 30 GEOMETRY .
Σελίδα 31
... proportion when the product of the extremes is equal to that of means thus if A multiplied by D , be equal to B multiplied by C , then A is said to be to B , as C is to D. POSTULATES OR PETITIONS . 1. That a right line may be drawn from ...
... proportion when the product of the extremes is equal to that of means thus if A multiplied by D , be equal to B multiplied by C , then A is said to be to B , as C is to D. POSTULATES OR PETITIONS . 1. That a right line may be drawn from ...
Σελίδα 47
... will be also greater . Therefore , in general , the chord , sine , tan- gent , & c . of any arc is proportional to the radius of the circle ( the same way the chord AB is to the chord a b , in the same proportion . So AB THEOREMS . 47.
... will be also greater . Therefore , in general , the chord , sine , tan- gent , & c . of any arc is proportional to the radius of the circle ( the same way the chord AB is to the chord a b , in the same proportion . So AB THEOREMS . 47.
Σελίδα 48
... proportion . So AB : ab : BC : bc : the same way the rest may be proved to be propor- tional . THEOREM XVII . If from a point A without a circle DBCE there be drawn two lines ADE , ABC , each of them cutting the circle in two points ...
... proportion . So AB : ab : BC : bc : the same way the rest may be proved to be propor- tional . THEOREM XVII . If from a point A without a circle DBCE there be drawn two lines ADE , ABC , each of them cutting the circle in two points ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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