60 MENSURATION OF 



mesure for letting of water or summe of er thyng 

 bitwene. fan biholde f e heght f ereof by bothe f e 

 holes, and biholde fe nonmbre of fe poyntes of 

 f e vmbre toward, namely vpon whome f e per- 

 pendicle falles. fan set D for a mark in fat place 

 where you stondes pan. go ferre or nerre fat 

 thyng whos heght you sekes. and fat by an evene 

 lyne and beholde este f e forsaide heght by bothe 

 holes, fan fere stondyng seke f e nonmbre of f e 

 poyntes of f e vmbre toward, and set fere C for 

 anofer mark, fan mesure howe many fete are 

 bitwene f ise tuo markes D and C and kepe fat 

 wele in f i mynde. fan abate f e lesse nonmbre of 

 f ese tuo in f e vmbre toward fro f e more and kepe 

 wele fe difference bytwene fo tuo nonmbres. 

 fan multiplie by twelve fe distaunce bitwene 

 f e forsaide D and C and alle fat comes of fat 

 multeplyeng departe you by fe distaunce of fe 

 poyntes. and to fat fat leves over, set als mykel 

 as fro f ethen to f e erthe and fan sekirli you has 

 f e heght of fat thynge. bot loke f e holes of f i 

 quadrant be right straite and elles you may 

 lightly be deceyvede. Peraventure you standes 

 in an aley. and fe thyng fat you wolde mete 

 es vp on an hegh hille. first fan biholde fe 

 heghte of fe hille by both fe holes of fe 

 quadrant, and fat by tuo stondynges of D and 

 C as we taght nowe next bifore. and marke 

 fat wele in f i mynde. fan biholde in f e same 

 wise f e heght of the hille and of fat same 

 thyng togedire. fan abate fe heght of fe hille 



