New Principles of Gardening. 15 
Practice. Divide a4, into three equal Parts, at ¢ and 4, 
with the Interval ae 5 on ¢ defcribe the Circle edb, and on 
d the Circle 4c; from 0, through cand d, draw odd, and 
oce; alfo from #, through d andc, draw “dk, and neh; 
extend your Compaffes from % to 4, and defcribe the Arch 44, 
and with the fame Diftance on a the Arch e/; and thus is the 
Ellipfis compleated as required. _ 
PROBLEM VIL 
O deferibe an Ellipfis a different Way from the pre- 
ceding. 
Practice. Divide the Diameter xy. into four equal Parts xxi. 
at eim, with the Radius xe; on e defcribe the Circle e x 4, 
and on i the Circle zevm, and on m the Circle my; at z 
draw 2f at Right Angles to xy: From f, through e and ™, 
draw the Right Linesfmé, and fea, alfo from #, through 
eand mthe Lines wmd and mec: With the Interval fg, on 
f defcribe the Arch gz 4, and on # the Arch wf, and. the 
Ellipfis will be compleated as required. 
PROBLEM VII. 
\ Odeferibe an Ellipfis according to any Length and Breadth . 
given,as hand i. 
Practice. Make ad equal to 4, bife&t ad ing by ef 
at Right Angles; make fe equal to#, and fe, fo, or e% 
eb, equal togd orga; {fo fhall dc be the Umbilque, or two 
Focus Points; upon which two Pius, Nails, Sc. being faf- 
ten’d, and about them put a String, whofe Ends faften toge- 
ther in the Point e, this String being moved about the two 
Pins with a Blacklead Pencil, Sc. will defcribe the E/ip/s, 
whofe Length and Breadth fhall be equal to the two given 
Lines hz. E. F. | ‘A 
PRO- 
