62 MENSURATION OF 



poyntes of fe vmbre ladde. Whilk after fe 

 ledying are poyntes of f e vmbre toward. Take 

 fe poyntes of the vmbre fus. late fe sonne 

 benies passe by bothe holes, and mark where 

 fe perpendicle falles. fan counte fe poyntes 

 fro fe begynnyng of fe side of f e vmbre to 

 fe touche of fe perpendicle. and fo are fe 

 poyntes of fe vmbre. fat es to say fe scha- 

 dowe. What poyntes ever yei be. whefer of 

 f e vmbre toward or froward. When any thynge 

 es whose hight you wilt mesure by f e schad- 

 dowe f ereof and a jerde. fan rere even vp a 

 jerde vpon fe playne grounde were fe ende 

 of f e schadowe of fat thyng whilk you wille 

 mesure, so rere it fat f e one parte of fame 

 jerde falle vpon fat schadowe. and f e of er part 

 of fat jerde falle withouten. and mark f e place 

 in fe jerde where fe schadowe begynnes to 

 touche it. and by fe quantite of the jerde 

 whilk es bitwene f e touche of f e schadowe 

 in fe jerde and fe playne. multeply fe quan- 

 tite of al fe schadowe whilk es bitwene fe 

 lower party of f e thyng to be mesured and 

 f e toppe of f e schadowe in f e playne. and 

 depart fan al fat by f e quantite of f e schadowe 

 whilk es bitwene f e toppe of f e schadowe and 

 fe erde. and f e nonmbre fat fan comes es f e 

 heght of fat thyng. Also if you wilt mesure 

 fe heght of a thyng by fe schadowe in ilk 

 houre of f e day. take a jerde of two fote longe 

 or thre, and on a playne rayse it even vp. and 



