Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 45
ibe arcs cut-ting the sides of the square at 1, 2, 3, 4, 5, 6, 7 and 8; join 1and 2, 3 and 4, 5 and 6, &c., and the figure is completed. In order to eight-square a hand-rail, or any piece that is to beafterwards rounded, draw the diagonals, a d and b c, upon theend of it, after it has been… … Fig. 56, 95.— Within a given circle to inscribe any regular polygon. Let a b c2, [Fig. 56, 57 and 58,) be given circles. Draw the diameter, a c ; upon this, erect an equi-lateral triangle, a e c, according to Art. 96 ; divide a c into as many equal parts as the polygon is to have sides, as at 1, 2,…
Carpentry · Architecture
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
![An illustration from L'optique divisée en trois livres : ou, l'On démontre d'une maniere aisée tout ce qui regarde 1. la propagation & les proprietez de la lumiere. 2. La vision. 3. La figure & la disposition des verres qui servent à la perfefectionner [sic] (1682)](https://img.insideoutlibrary.com/img/200/ia-loptiquedivise00ango-215-23.webp)
