Ff. 117v - 118r. .C(apitolo). LXXI. D(e). un quadro quale .3. per ogni verso Diametro elati et giontovi .3. doventa .4. per og' verso (Of a square which has 3 on every diagonal and side and adding 3 has 4 in every direction). Says to start with one object in each cell of a 3 x 3 array, which has three on each line, then add one to the cells along a diagonal to get 4 in each line. This gets 6 on that diagonal however, but he ignores that.
