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
... marks , by its annual inundations , which 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and measures to enable them to distin- guish and adjust the limits of their respective grounds , when the waters were withdrawn .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 ...
... marks , by its annual inundations , which 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and measures to enable them to distin- guish and adjust the limits of their respective grounds , when the waters were withdrawn .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 ...
Σελίδα 101
... mark — in an angle , denotes it to be known , or the quantity of degrees it contains to be given ; and this mark ' on a side , denotes ‣ its length to be given in feet , yards , perches , or miles , & c . and this mark , either in an ...
... mark — in an angle , denotes it to be known , or the quantity of degrees it contains to be given ; and this mark ' on a side , denotes ‣ its length to be given in feet , yards , perches , or miles , & c . and this mark , either in an ...
Σελίδα 155
... mark the point where he is to stick his peg . The figure is sufficient to render the whole evident ; and to shew that the sum of the chains will be the horizontal measure of the base of the hill ; for de = Ao , fg = op , hi = pq , & c ...
... mark the point where he is to stick his peg . The figure is sufficient to render the whole evident ; and to shew that the sum of the chains will be the horizontal measure of the base of the hill ; for de = Ao , fg = op , hi = pq , & c ...
Σελίδα 165
... mark , to signify that to be an external angle , or one measured out of the ground . Proceed we then as be- fore , from E to F , to G , and thence to A , measuring the angles and distances , and placing them as before , in the field ...
... mark , to signify that to be an external angle , or one measured out of the ground . Proceed we then as be- fore , from E to F , to G , and thence to A , measuring the angles and distances , and placing them as before , in the field ...
Σελίδα 167
... mark be fixed at any point in the ground , as at H , from whence all the angles can be seen ; let the measurers of the lines HA , HB , HC , & c . be taken to every angle of the field from the point H ; and let those be placed opposite ...
... mark be fixed at any point in the ground , as at H , from whence all the angles can be seen ; let the measurers of the lines HA , HB , HC , & c . be taken to every angle of the field from the point H ; and let those be placed opposite ...
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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