Geodaesia : or, The art of surveying and measuring land made easy (1768)
Love, John, fl. 1688, Clark, Samuel · London : Printed for J. Rivington · leaf 94
a plot of a field at one Jlationin any place thereof^ from whence youcan fee all the angles by the femicircle. ADmit A B C D E F to reprefent a field, of whichyou are to take the plot: Firft, fet yourfemicircle upon the ftaff in any convenient placethereof, as at o, and caufe marks to be fet up… … the 7 2 Divers Ways to take the Plots of Fields. the moveable index about, (the femicircle remainingimmoveable) till through the fights thereof you efpythe mark at B. See what degrees on the brafs limbare qit by the index, which fuppofe 80 5 write thatdown in your field book; fo turn the index…
Surveying
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