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 68
... degrees at the point A , of the line AB , suppose , of 45 degrees , fig . 56 . flg . 56 . From a scale of chords take 60 degrees , for 60 is equal to the radius ( by cor . theo . 15. ) and with that distance from A , as a centre ...
... degrees at the point A , of the line AB , suppose , of 45 degrees , fig . 56 . flg . 56 . From a scale of chords take 60 degrees , for 60 is equal to the radius ( by cor . theo . 15. ) and with that distance from A , as a centre ...
Σελίδα 189
... degrees be less than 180 , turn the arc of your protrac- tor downwards , or ... degrees be less than 180 , turp the arc of your protractor upwards , or ... distance 55C . 201. so is that station protracted . At the end of the first ...
... degrees be less than 180 , turn the arc of your protrac- tor downwards , or ... degrees be less than 180 , turp the arc of your protractor upwards , or ... distance 55C . 201. so is that station protracted . At the end of the first ...
Σελίδα 192
... degrees upon the line ; then prick off the number of degrees contained in the given angle and draw a line from the first point through the point at the degrees ; upon which lay the stationary distance . Let this line be lengthened ...
... degrees upon the line ; then prick off the number of degrees contained in the given angle and draw a line from the first point through the point at the degrees ; upon which lay the stationary distance . Let this line be lengthened ...
Σελίδα 227
... degrees ; but at the bottom of the table when above 45 degrees . Each column signed with a course con- sists of two parts , one for the ... Dist , next the margin of the page . EXAMPLE . In the use of those tables , a CALCULATION . 227.
... degrees ; but at the bottom of the table when above 45 degrees . Each column signed with a course con- sists of two parts , one for the ... Dist , next the margin of the page . EXAMPLE . In the use of those tables , a CALCULATION . 227.
Σελίδα 229
... distance is given in perches or any other measures , the method of proceeding being exactly the same in every case . Again , let the bearing be 543 degrees , and distance as before ; then over said degrees we find the same numbers ...
... distance is given in perches or any other measures , the method of proceeding being exactly the same in every case . Again , let the bearing be 543 degrees , and distance as before ; then over said degrees we find the same numbers ...
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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