The Principles and Practice of Land, Engineering, Trigonometrical, Subteraneous, and Marine Surveying. With an AppendixJohn Ollivier, 1843 - 356 pages |
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accuracy acres adjusted ascer ascertained base beam compasses bearing boundary brass centre chain chord circle Circumferentor clamp coincide curve decimal deducted diameter difference direction distance divided division draw drawn equal error evident extremity feet field-book figure ground height horizontal Hounslow Heath hypothenuse inches instrument intersection laid length limb line A B logarithm magnetic bearing maps marked means measured miles mode multiplied necessary needle object offsets Ordnance Survey parallel parallel ruler parish perches perpendicular placed plane plate plotted prop protractor radius Railway reading reduced right angles right line road rods scale screws secant side sine spherical excess spirit level square staff station line surface survey surveyor taken tangent telescope theodolite triangle Trigonometrical Survey vernier vertical vulgar fraction width zero دو دو دو دو وو وو دو