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 σελίδες |
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Σελίδα ix
... laid them under the necessity of inventing cer- tain methods and measures to enable them to distin- guish and adjust the limits of their respective grounds , when the waters were withdrawn . And this opinion is not entirely to be ...
... laid them under the necessity of inventing cer- tain methods and measures to enable them to distin- guish and adjust the limits of their respective grounds , when the waters were withdrawn . And this opinion is not entirely to be ...
Σελίδα xi
... ad- ded , a table of the sun's declination : how to find by what scale a map is laid down , having the map and area given : how to find the content of ground that is sur- veyed by a chain that is too long or too PREFACE . xi.
... ad- ded , a table of the sun's declination : how to find by what scale a map is laid down , having the map and area given : how to find the content of ground that is sur- veyed by a chain that is too long or too PREFACE . xi.
Σελίδα 42
... laid on the tri- angle DEF , so as to make the points A and B coincide with D and E , which they will do , because AB = DE ( by the hypothesis ) ; and since the angle A = D , the line AC will fall along DF , and inasmuch as they are sup ...
... laid on the tri- angle DEF , so as to make the points A and B coincide with D and E , which they will do , because AB = DE ( by the hypothesis ) ; and since the angle A = D , the line AC will fall along DF , and inasmuch as they are sup ...
Σελίδα 61
... Lay BL from B to L ; from B with the line BO , describe an arc , and from L with LO describe another arc ; from O , the interjection point of those arcs , draw BO and OL , and BOL is the triangle required . This is manifest from the ...
... Lay BL from B to L ; from B with the line BO , describe an arc , and from L with LO describe another arc ; from O , the interjection point of those arcs , draw BO and OL , and BOL is the triangle required . This is manifest from the ...
Σελίδα 62
... 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 triangle , Otherwise ...
... 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 triangle , Otherwise ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
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