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 76
... of so many parts to an inch ( whether of feet , yards , perohes , or miles ) as the respective number at the end of each expresses ; but in the surveying way , they are counted to be so many perches to an 76 PROBLEMS .
... of so many parts to an inch ( whether of feet , yards , perohes , or miles ) as the respective number at the end of each expresses ; but in the surveying way , they are counted to be so many perches to an 76 PROBLEMS .
Σελίδα 77
... feet to an inch . On the contrary side there are two scales , one of 10 , and the other of 20 ; or one of 100 , and the other of 200 ; or one of 1000 , and the other of 2000 parts to an inch , diagonally divided ; ( a view of the scale ...
... feet to an inch . On the contrary side there are two scales , one of 10 , and the other of 20 ; or one of 100 , and the other of 200 ; or one of 1000 , and the other of 2000 parts to an inch , diagonally divided ; ( a view of the scale ...
Σελίδα 101
... feet , yards , perches , or miles , & c . and this mark , either in an angle or on a side , de- notes the angle or side required . 1 From these proportions it may be observed ; that , to find a side , when the angles and one side are ...
... feet , yards , perches , or miles , & c . and this mark , either in an angle or on a side , de- notes the angle or side required . 1 From these proportions it may be observed ; that , to find a side , when the angles and one side are ...
Σελίδα 102
... feet , yards , miles , & c . ) required the legs AB and BC . Geometrically . Make an angle of 46 ° . 30 ' . in blank lines ( by prob . 16. sect . 1. ) as CAB ; lay 250 , which is the given hy- pothenuse , from a scale of equal parts ...
... feet , yards , miles , & c . ) required the legs AB and BC . Geometrically . Make an angle of 46 ° . 30 ' . in blank lines ( by prob . 16. sect . 1. ) as CAB ; lay 250 , which is the given hy- pothenuse , from a scale of equal parts ...
Σελίδα 129
... feet . Height of the instrument , or of the observ- er , 5 feet . Required , the height of the steeple . The figure 17 OF HEIGHTS . 129 An angle of altitude may be also taken by any ...
... feet . Height of the instrument , or of the observ- er , 5 feet . Required , the height of the steeple . The figure 17 OF HEIGHTS . 129 An angle of altitude may be also taken by any ...
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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