HEIGHTS AND DISTANCES. 65 



a quadrat or quarterd. fat es to say a table even 

 foure square of wode or brasse of what quantite 

 you wilt, and ay f e more it be. f e better it es. 

 and loke it be over alle square, in f e manner of 

 ABCD and put a chippe of what length you wilt 

 in f e cornelle B and anofer in f e cornelle C 

 and f e f ird in f e cornel D and loke f ei be fast 

 on fat quadrat fat evenly f ei stande raysed vp. 

 and f e side of f e quadrat bitwene A and B mote 

 be persede reulefully. in whilk persyng put a 

 chippe like f e ofer thre. bot it sale be moveable 

 fro A to B and f is chippe sale hight E and wite 

 you that A es f e right cornel vpward. B f e left 

 cornel vpward. C fe left cornel don ward. D f e 

 right cornel donward. When f e face of f e quad- 

 rat es torned toward ye. and f ese chippes I calle 

 eighen as in f e quadrant, fan loke even vp by C 

 and B chippis or eighne to f e heyest of f e toure. 

 So fat fe quadrat joyne to fe walle. and fat 

 highest of f e toure sale hight F loke f e side AB 

 be departed on 30 or 40 or howe fele you wilt, 

 and in f e same manere departe J?e side AD. fan 

 move J?e chippe E hedire and J? edire til you se J?e 

 hiest F ageyne thurgh chippes D, E noght 

 chaunging J?e rafer place BC fan biholde where 

 \ e chippe E stondes bitwene A and B and loke 

 howe mekil fat part es EA to AD and so mekil 

 part es DC to CBF and howe ofte EA es in AB 

 so ofte es CD in CBF forfi multiply DA in AB 

 and fat comes f ereof departe by AE and fat 

 nonmbre howe ofte it be es f e heght of CBF and 



F 



