A text book of geometrical drawing, for the use of mechanics and schools, in which the definitions and rules of geometry are familiarly explained (1849)
parentall the edges and sides could be seen. The apparent oppositeangles in each side are equal, two of them being 120°, and theother two 60°; all the opposite boundary lines are parallel to eachother, and as they are all of equal length may be measured byone common scaky and all fines parallel to… … Plate 39. ISOJIETRICAL FIGIHES Fuj.l. Fig. 2.
