Geodaesia : or, The art of surveying and measuring land made easy (1768)
Love, John, fl. 1688, Clark, Samuel · London : Printed for J. Rivington · leaf 90
. Firft, Take the whole length of your line ofchords, or the chord of 90 degrees, with your com-paffes; this diftance fet off from C to *. Then take30 degrees from the line of chords, and fet thatfrom * to H. Draw the line C H, which will beone fide of the greateft triangle that can be infcribedin… … F 2 Circle, 68 Of Inftruments and their Ufes. circle, as A B C j divide the arch thereof, viz. A C,into 90 equal parts; which you may do by dividingit firft into three equal parts, and every of thofedivifions into three equalparts more, and every ofthe laft divifions into ten equal parts. Secondly,…
Surveying
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