## A Treatise on Surveying: Containing the Theory and Practice: to which is Prefixed a Perspicuous System of Plane Trigonometry. The Whole Clearly Demonstrated and Illustrated by a Large Number of Appropriate Examples, Particularly Adapted to the Use of Schools |

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ABCD acres adjacent adjacent angles angles ABC base bearings and distances Calculation centre changed bearing Co-secant Co-sine Co-tang column compass decimal Degrees demonstration diff difference of latitude dist divide division line draw east equal EXAMPLES figures find the angles find the area fourth term Ģ Ģ Ģ given angle given area given bearing given number given side Given the bearings hypothenuse John Gummere Lat Dep latitude and departure length line FE logarithm measured meridian multiplier natural number º º off-sets parallelogram parture perches perpendicular pole star prob quired quotient radius rectangle Required the area right angle right line right-angled triangle Ş ş Secant side AC sine square root station stationary lines subtract take the difference Tangent tract of land trapezium triangle ABC trigonometry two-pole chains