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 104
... divisions on these respective lines , are the lo- garithms of numbers , sines and tangents , taken from a scale of equal parts , and applied on the lines of the scale . The first and third terms in the foregoing proportions , being of a ...
... divisions on these respective lines , are the lo- garithms of numbers , sines and tangents , taken from a scale of equal parts , and applied on the lines of the scale . The first and third terms in the foregoing proportions , being of a ...
Σελίδα 151
... division ) or by one of 50 links , which con- tains two poles or perches ; but because the length of a perch differs in many places , therefore the lengths of chains and their respective links will differ also . The English statute ...
... division ) or by one of 50 links , which con- tains two poles or perches ; but because the length of a perch differs in many places , therefore the lengths of chains and their respective links will differ also . The English statute ...
Σελίδα 178
... divisions , and sometimes by dia- gonals , drawn from one concentric circle of the limb to another . In the middle is fixed a circumferentor , with a needle ; but this is of little or no use , except in finding a meridian line , or the ...
... divisions , and sometimes by dia- gonals , drawn from one concentric circle of the limb to another . In the middle is fixed a circumferentor , with a needle ; but this is of little or no use , except in finding a meridian line , or the ...
Σελίδα 185
... divisions of a semicircle , or 180 degrees ; and these again are subdivded into halves , or quarters , as the size of the instrument will admit . That side of the frame on which the 360 degrees are , supplies the place of a theodolite ...
... divisions of a semicircle , or 180 degrees ; and these again are subdivded into halves , or quarters , as the size of the instrument will admit . That side of the frame on which the 360 degrees are , supplies the place of a theodolite ...
Σελίδα 191
... divisions on the edge of the semicircle will run from 0 to 180 , from right to left : again , if it be turned the other way , or down - wards , keeping the centre - hole thereof on the aforesaid point in the line , then the divi- sions ...
... divisions on the edge of the semicircle will run from 0 to 180 , from right to left : again , if it be turned the other way , or down - wards , keeping the centre - hole thereof on the aforesaid point in the line , then the divi- sions ...
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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