betweene them, doth not burden much, but leaning, it commeth to have all the paise of the cariage on the backe of that wheele upon the which it leaneth.  If the spokes of the same be straight they wil soone breake:  for that the wheele leaning, the spokes come also to leane, and not to sustaine the paise by the straightnesse of them, and so when the carte goeth even, and when they are least burdened, they come to bee strongest:  when the Carte goeth awrye, and that they come to have moste paise, they bee weakest.  Even the contrarie happeneth to the crooked spokes of the Frenche Cartes, for that when the carte leaning upon one side poincteth uppon them, because they bee ordinary crooked, they come then to bee straight, and to be able to sustayne strongly al the payse, where when the carte goeth even, and that they bee crooked, they sustayne it halfe:  but let us tourne to our citie and Fortresse.  The Frenchemen use also for more safegarde of the gates of their townes, and for to bee able in sieges more easylye to convey and set oute men of them, besides the sayde thinges, an other devise, of which I have not seene yet in Italye anye insample:  and this is, where they rayse on the oute side from the ende of the drawe bridge twoo postes, and upon either of them they joigne a beame, in suche wise that the one halfe of them comes over the bridge, the other halfe with oute:  then all the same parte that commeth withoute, they joygne together with small quarters of woodde, the whiche they set thicke from one beame to an other like unto a grate, and on the parte within, they fasten to the ende of either of the beames a chaine:  then when they will shutte the bridge on the oute side, they slacke the chaines, and let downe all the same parte like unto a grate, the whiche comming downe, shuttethe the bridge, and when they will open it, they drawe the chaines, and the same commeth to rise up, and they maye raise it up so much that a man may passe under it, and not a horse, and so much that there maye passe horse and man, and shutte it againe at ones, for that it falleth and riseth as a window of a battelment.  This devise is more sure than the Parculles, because hardely it maye be of the enemye lette in such wise, that it fall not downe, falling not by a righte line as the Parculles, which easely may be underpropped.  Therfore they which will make a citie oughte to cause to be ordained all the saide things:  and moreover aboute the walle, there woulde not bee suffered any grounde to be tilled, within a myle thereof, nor any wall made, but shoulde be all champaine, where should be neither ditch nor banck, neither tree nor house, which might let the fighte, and make defence for the enemie that incampeth.

[Sidenote:  Noote; The provision that is meete to be made for the defence of a toune.]