A system of geometry and trigonometry, with a treatise on surveying; in which the principles of rectangular surveying, without plotting, are explained (1835)
Flint, Abel, 1765-1825, Gillet, George · Hartford, Belknap & Hamersley; New York, Cooke & Co. · leaf 94
tions howTO use it, and how to prove the accuracy of it. In surveying, each angular point is considered the centreof a circle divided into 360 equal parts called degrees. The circle is also divided into four equal parts, calledquadrants, by north and south, and east and west lines cross-ing each… … At the centre is the pivot or centre-pin on which the needleturns. The compass is fixed on the head of a staff, and itmay be directed to any object on any course whatever,while the needle retains its polarity. Courses are countedeither east or west from their respective meridians. To bemore…
Surveying
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