Fig. 201.
[ CXII]
How to Draw Concentric Octagons, with Illustration of a Well
The geometrical figure 202 A shows how by means of diagonals AC and BD and the radii 1 2 3, &c., we can obtain smaller octagons inside the larger ones. Note how these are carried out in the second figure (202 B), and their application to this drawing of an octagonal well on an octagonal base.
| Fig. 202 A. | Fig. 202 B. |
Fig. 203.