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 171
... needle touched with a load stone , which always retains the same situation ; that is , it always points to the North and South points of the horizon nearly , when the instrument is horizontal , and the needle at rest . The box is ...
... needle touched with a load stone , which always retains the same situation ; that is , it always points to the North and South points of the horizon nearly , when the instrument is horizontal , and the needle at rest . The box is ...
Σελίδα 172
... needle , will give the number to be placed in the second column of your field - book in a line with station No. 1 , and expresses the number of degrees the stationary Ine is from the north , counting quite round with the sun . Most needles ...
... needle , will give the number to be placed in the second column of your field - book in a line with station No. 1 , and expresses the number of degrees the stationary Ine is from the north , counting quite round with the sun . Most needles ...
Σελίδα 173
... needle . Two - pointed needles have some times a ring , but more usually a cross towards the north end and the south end is generally bearded towards its extremity , and some times not , but its arm is a naked right - line from the cap ...
... needle . Two - pointed needles have some times a ring , but more usually a cross towards the north end and the south end is generally bearded towards its extremity , and some times not , but its arm is a naked right - line from the cap ...
Σελίδα 174
... needle , which will be the same as if they were taken from the object to the instrument , the direction of the index being the same . Let the degree be inserted in the field - book , and the stationary distance be measured and annexed ...
... needle , which will be the same as if they were taken from the object to the instrument , the direction of the index being the same . Let the degree be inserted in the field - book , and the stationary distance be measured and annexed ...
Σελίδα 175
... needle . Again from B observe an object at C , with the north of the box to your eye , and set down the degree cut by the south point of the needle , so have you the bear- ings of the lines AB and BC ; you may then set up your ...
... needle . Again from B observe an object at C , with the north of the box to your eye , and set down the degree cut by the south point of the needle , so have you the bear- ings of the lines AB and BC ; you may then set up your ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
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