A system of geometry and trigonometry : with a treatise on surveying ... in which, also, the principles of rectangular surveying ... are fully explained: with a complete series of mathematical tables, and the necessary explanations (1830)
Flint, Abel, 1765-1825, Gillet, George, Barnard, Frederick A. P. (Frederick Augustus Porter), 1809-1889 · Hartford : Cooke & co. · leaf 76
number OF ACRES, BEING CONFINED TO A CER-tain BASE. Double the given number of acres, to which, annex 5 ci-phers, and divide by the base ; the quotient will be the per-pendicular height in links. Example. Upon a base of 40 chains to lay out 100 acressin a triangular form. Answer. 5000 links or 50… … When the given base is so situ-ated that a perpendicular of suf-ficient length cannot be erectedtherefrom, continue the base asfrom B to D, Jig. 65. fromwhich erect the perpendicularDC, and complete the triangleABC, which will contain 100acres. ^ Fig. 65.
Surveying
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from Divina proportione : opera a tutti glingegni perspicaci e curiosi necessaria oue ciascun studioso di philosophia: prospettiua pictura sculptura: architectura: musica: e altre mathematice: suavissima: sotile: e admirabile doctrina consequira: e delecterassi: co[n] varie questione de secretissima scientia (1509)](https://img.insideoutlibrary.com/img/200/ia-divinaproportion00paci-88-141.webp)
