Names of weapons for offence.

acinace sarissa
daga gabina
ense clipei
gladio secure
spata tragula
arpe clave
lingula categia
machera dolabra
st[r]agule la bipenne
doloni
sicca
pugione
clunade
secespita
muclone
aclides
telo
veruto
fusti
baculi
haste
hastili
concti
lancea
pilo
giese
ruma
rumice
sparo
iaculo

(These are proper names of weapons, largely Latin, and are given here as they stand.)

This, in a single opening of the compasses, divides the circle into 3 - b c - equal parts, and into 6 - a c -, and into 8 - f c - and into 24 - a f.

d - b e c - a f

If you wish to divide a circle into 8 equal parts without closing the compass, you know that from 6 to 8 is the third of 6; therefore, the opening of the compass with which you made the circle being one sixth part of that circle, you will divide the said sixth part into 4, and 3/4 of this sixth of the circle will be the eighth part of the whole. To divide this sixth part into 4 parts, do thus: having made your circle, without moving the compass from its opening, put one of its points at point a, and moving the other point you will make the line b c; and, fixing the point at c, make with the other the line a d. Then put the point of these compasses at b and make the line d e a, then draw the line d e f, and from a to f is 1/4 of the line a c. Therefore, for the reasons stated above, if a c divided into 4 contains in itself the 4 twenty-fourths, likewise ...

But to prove the reasons above better: if your circle were divided into 24 parts, a c, which is the sixth part of that circle, contains in itself 4, for it says: 4 times 6, 24; f c contains in itself 3, for 8 times 3 makes likewise 24. Therefore you have here 3 different divisions in a circle without opening or closing the compass. As a f is a twenty-fourth of the circle, f c is 1/8 of the circle, a c is exactly 1/6. But I well remind you, make the proof carefully of the line b c above forgotten; it is the one that guides the line d f, that is, where it intersects the line d a at point e.