22 
Fig. XLVI- 
New Principles of Gardening. 
Practice. On de (by Pros. XIV. hereof,) make the 
Equilateral Triangle ¢4e, and on 4e the Equilateral Triangle 
hfe, and on bf the Triangle haf, continue ¢ 4b to 6, and 
fb toc, making bc equal to fh, and hb equal to eh, laltly, 
Fig. 
XLVII. 
Fig: 
XL Vill, 
eight Times, and drawing the Right Lines E], I Be 
join 2b, bc, and cd, and the Hexagon will be compleated as 
required. Y.E.F. 
PROBLEM XXIL. 
, O deferibe a Heptagon on a given Line (H1.) 
Deriition. A Hertacon is a Geometrical Figure of fe- 
ven Angles, from the Greek Hepta, feven, and Gonia, an 
Angle, 
Practice. ‘Bile@ HI in'C, and from thence raife the 
Perpendicular CM; with the Interval HI, ont defcribe the 
Arch 12345; divide this Arch into fix equal Parts, and 
make AB equal to A1; on B, with the Radius BI, or BH, 
deferibe the Circle I1CHm; laftly, take the Line HI in 
your Compafles, and fet. off that Length from H to K, from 
K to L, from Ltom, frommtoN, N toO, and join the 
Right Lines. KH, KL, Lm, mN, NO, and OJ, they will 
compleat the Hepragon required. Q,F. F. 
PROBLEM XXII 
‘. ] 10 defiribe an Oétagon, whofe Sides {hall be each equal 
toa given Line (EC.) 
DeriniTion. An OCTAGON is a plain Geometrical Figure, 
confifting of eight equal Sides and Right-equal Angles, trom 
Odo, eight, and Goa an Angle. 
Practice. Bife& ED ia C, whereon raife the Perpendi- 
cularc#; on D, with the Interval DE, defcribe the Arch 
BE, which divide into fix equal Parts, as before; make BA | 
equal to two of thofe Parts, and on A, with the Interval AD, 
defcribe the Circle DEIFGHLM, wherein fet round ED, 
H, 
3 
