64 MENSURATION OF 



and of fat thyng. fan loke 1 ho we mikil es bi- 

 twene f i fote and f e grounde of fat f yng in f e 

 tyme of beholdynge. and to fat length set f e 

 space fro f ethen to f e erthe. fan multiply al fat 

 by f e length of f e gerde. and fan departe al fat 

 by f e space bitwene ye and f e jerde and f ere- 

 with fe quantite fro fethen to fe erthe. and 

 fat es f e heght. Also when you wilt mesure 

 f e heght of any thing by two jerds, even cor- 

 neldly joyned, take a j^erde even to f e length of 

 fi stature, and anofer jerde, tuo so longe als 

 fat in fe myddel of f e lengere jerde, set fe 

 schortere even corneldely fan f is instrument f us 

 made layde by f e playne ground til by f e toppes 

 of bothe f e jerdes you se f e toppe of the f ing 

 to be mesured, fan make fere a mark and set 

 fereto fi stature, and fan set fe marke fere, 

 and so heigh es fat thyng howe mekil length es 

 bitwene f e grounde of fat thyng and f e latter 

 mark, bot forgete noght fat perpendicle or equi- 

 pendy, fat es to say, even hangere lolle by f e 

 toppe of f e longer rodde to schewe when fin 

 instrument es even vpright, and when it bagges 

 Ensample, f e stature of f e matere be called AB, 

 fe jerde doubling it CD fe jerde evene cor- 

 neldy joyned to it AE, and the foundement of 

 f e f yng F, fan I say f e height of the f yng es BF, 

 with fe quantite of BC. When you standes by 

 a walle of a castelle or toure, and you wolde 

 mesure f e heght of it with outen defaute, make 

 1 MS. loloke. 



