The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtEvert Duyckinck, 1814 - 508 σελίδες |
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Σελίδα 29
... true to 8 , or 9 places ; and therefore it will be very easy to exa- mine any suspected Logarithm in the Tables . For the arrangement of Logarithms in a Table , the method of finding the Logarithm of any natural number , and of finding ...
... true to 8 , or 9 places ; and therefore it will be very easy to exa- mine any suspected Logarithm in the Tables . For the arrangement of Logarithms in a Table , the method of finding the Logarithm of any natural number , and of finding ...
Σελίδα 98
... true , except the two first or two last terms of the pro- portion are on the line of tangents , and neither of them under 45 ° ; in this case the extent on the tangents is to be made in a contrary direction : For had the tangents above ...
... true , except the two first or two last terms of the pro- portion are on the line of tangents , and neither of them under 45 ° ; in this case the extent on the tangents is to be made in a contrary direction : For had the tangents above ...
Σελίδα 149
... true , let the measure of the angle CHD be taken by the line oo , with the chain : if this angle corresponds with its containing sides , the length of the line DC is truly obtained , and the whole work is truly taken . Note , That in ...
... true , let the measure of the angle CHD be taken by the line oo , with the chain : if this angle corresponds with its containing sides , the length of the line DC is truly obtained , and the whole work is truly taken . Note , That in ...
Σελίδα 167
... true ; if not , turn the table about , the index lying on the last line , till through the sights you see the object in the first station and then screw it fast , and keeping the edge of the index to the second station , direct your ...
... true ; if not , turn the table about , the index lying on the last line , till through the sights you see the object in the first station and then screw it fast , and keeping the edge of the index to the second station , direct your ...
Σελίδα 227
... true place of the extended line . Lay then the fiducial edge of the scale from b to D , and take a distance from C , that will just touch the edge of the scale ; carry that distance along the edge , till the point which was in C , cuts ...
... true place of the extended line . Lay then the fiducial edge of the scale from b to D , and take a distance from C , that will just touch the edge of the scale ; carry that distance along the edge , till the point which was in C , cuts ...
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acres altitude Answer arch base bearing blank line centre chains and links circle circle of latitude circumferentor Co-sec Co-tang column compasses contained decimal Dep Lat Dep difference Dist divided divisions draw east Ecliptic edge EXAMPLE feet field-book figures fore four-pole chains geometrical series given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied Natural Co-sines natural sine Nonius number of degrees object observed off-sets opposite parallelogram perches perpendicular plane pole pole star PROB proportion protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect semicircle Sextant side sights square root station stationary distance subtracted survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry vane versed sine vulgar fraction