The compleat surveyor containing the whole art of surveying of land by the plain table, theodolite, circumferentor, and peractor ... : together with the taking of all manner of heights and distances, either by William Leybourn.

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Title: The compleat surveyor containing the whole art of surveying of land by the plain table, theodolite, circumferentor, and peractor ... : together with the taking of all manner of heights and distances, either by William Leybourn.
Author: Leybourn, William, 1626-1716.
Publication: London :: Printed by R. & W. Leybourn, for E. Brewster and G. Sawbridge ...,; 1653.
Rights/Permissions: To the extent possible under law, the Text Creation Partnership has waived all copyright and related or neighboring rights to this keyboarded and encoded edition of the work described above, according to the terms of the CC0 1.0 Public Domain Dedication (http://creativecommons.org/publicdomain/zero/1.0/). This waiver does not extend to any page images or other supplementary files associated with this work, which may be protected by copyright or other license restrictions. Please go to http://www.textcreationpartnership.org/ for more information.
Subject terms: Surveying -- Early works to 1800.
Link to this Item: http://name.umdl.umich.edu/A48331.0001.001
Cite this Item: "The compleat surveyor containing the whole art of surveying of land by the plain table, theodolite, circumferentor, and peractor ... : together with the taking of all manner of heights and distances, either by William Leybourn." In the digital collection Early English Books Online 2. https://name.umdl.umich.edu/A48331.0001.001. University of Michigan Library Digital Collections. Accessed June 13, 2025.

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4. Any angle being given, to finde what number of degrees and minutes are contained therein.

Suppose CAB were an angle given, and that it were required to finde the quantity thereof. Open your Compasses (as before) to 60 degrees of your Chord, and placing one foot in 〈◊〉〈◊〉, with the other describe the arch CB, then take in your Compasses the di∣stance CB, and measuring that extent upon the little of Chords from the beginning thereof, you shall finde it to reach to 40 degrees 20 minutes, which is the quantity of the required angle.

If any angle given or required shall contain above 20 degrees, you must then protract it at twice, by taking first the whole line, and then the remainder.