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 18, 2025.

Pages

PROBLEME I. Ʋpon a right line given, how to erect another right line, which shall be perpendicular to the right line given.

THe right line given is AB, upon which from the point E it is required to erect the perpendicular EH.

[illustration]

Opening your Compasses at pleasure to any conveni∣ent distance, place one foot in the assigned point E, and with the other make the marks C and D, equidistant on each side the given point E. Then open∣ing your Compasses again to any other convenient distance wider then the former, place one foot in C, and with the other describe the arch GG; also (the Compasses remaining at the same distance) place one foot in the point D, and with the other describe the arch FF, then from the point where these two arches intersect or cut each other (which is at H) draw the right line HE which shall be perpendicular to the given right line AB, which was the thing required to be done.