for GardeneR"V"&c. 15 



In this Page IJIjal/ comprize three: Vropofitions^ 

 together with their PraSice on. the Ground. 



PROPOSITI ON 11. 

 To let fall a Ferpendiciilar on the IVuil; of an Angle. 

 Upon Paper J Fig, l,; 

 From the Angle A, deicribe at Pleafure the Arch 

 B C^ and from the Point B and C, make the Sedi- 

 en .D ^ and the Line F F is the Line requir'd. •[ 

 PraBice on the Ground^ Y\g. /\^ , 



Move the Garden Square on the Bale of Trian- 

 gle E F, 'til the: Poii^t of the Square G, comeover- 

 right,|he Point A, then ftrain the Line to D. 



V PROPO^SITION IIL 

 To hriyig down a Perpendicular Upon.: a Line give?!, or a 

 Point without or near that Line. 

 , Upon Paper J Fig. 2. 

 This is fomething like the former-, for from the 

 Point C you are to draw D E, cutting the Line 

 A B at p and E^ froip. the Points D and E, make 

 the Sedion F •, draw the Line C'F, and the Line 

 C O will be the Line demanded.' .: , ' ..7', , 

 Pra&ice on the Groimd^Tig*:'^. 

 In this Cafe either the Line or Square will do*, 

 the Method has been hinted at already, and the 

 Scheme tells the reft-i i - 



,,-.0 . PROP0SITrON\YL 

 Bj a Point given, to draw a Line .pai\jHel to a right 

 Line given. 

 Upon Paper, Fig. ^. 

 Let H F be the Lines given, add G the parallel 

 Diftance -, fix the Gompafs in H and F, and defcribe 

 the Arches G andl^ by applying the. Ruler to ■<j 

 and I, .you may draw the Line reqinir'd. 

 Fra^ice on. the Ground, Fig. 6. 

 By applying the Square to the Points H and F, 

 this Parallel is eafily fet ofFin G and L / Vid^ the 

 Scheme, Fig. 6. , .{i..-. ,w 



