A Rudimentary Treatise on Land and Engineering Surveying, with all the modern improvements ... With illustrationsJohn Weale, 1850 - 218 Seiten |
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accuracy acres adjustment axis beam compasses breadth bubble centre common cross sections cubic yards cutting datum line depths difference of level direction distance divided draw embankment equal error EXAMPLE feet field book figure finding the contents fore sights formation level formula Gentleman's Diary given gradient ground height horizontal inches inclosure instrument intersection laid Lay the ruler length level book main lines measured method mile move it parallel nearly NOTE object offsets parallax parallel plate parallel ruler perpendicular position Prob protractor quality lines radii radius railway curves Rankine's method ratio right angles river Ouse road scale screw shewn shews sine spirit level square links staff stations staves straight fence surface survey surveyors Table taken taking tangent telescope theodolite Tithe Commissioners trapezium triangle tube tunnel vernier vernier scale vertical viaduct whence