New Principles of Gardening. II 
PROBLEM XIX. 
O deftribe a ferpentine Line about an Eliipfis. Fig XXUD 
Practice. By Pros.IX. Sect. II. defcribe the Ellip/s 
abed, according to its Diameters given, and extend out the 
Lines eg, ¢4, and fg, f4, infinitely: Divide £4 into four equal 
Parts, and make fz, 64, g 4, and em, each equal to one Fourth 
of £4, which Points z, 4, /,m, are the four Centers on which 
the Line is defcribed as following, vz. On / defcribe the Arch 
np, on? the Arch po, on & the Arch ov, on m the Archv w, 
on /the Arch wx, and on z the Arch +g, and fo (as before 
in the circular Spirals) this may be continued about as often 
as required. : 
PROBLEM Xx. 
O defcribe with Compaffes, &c. any rural or irregular Fig XXIV. 
Curved Line, as zw m. 
Practice. firfi, with a Pencil trace out the Line, and 
at every Turning, as w,i,h, make a Point. Secondly, in eve- 
ry fuch Dzvz/ion aflume another Poimt, as7v, and by Pros. XIII. 
hereof defcribe the Arch 2 7w, and then proceed in like man- 
ner to find the Cexters of the Arches ws, 24, Sc. till the 
whole Line is defcribed as required. 
SB Gebadk 
Of Superficial Figures. 
Urerricra Ficures, neceflary to be underftood by Gar- 
deners, Sc. are the Circle, Ellipfis, Triangle, Square, 
Parellogram, Pentagon, Hexagon, Septagon, Ottagon, 
Nonagon, Decagon, Sc. whole Definitions and Confirucizons 
are as follows. C2 PR O- 
