Algebraic place-values, a trajectory, and a column of woven rings
Numero-cosa-censo-cubo matched to decimal orders; 12 x 12 = 144; an interlace and an arc
A short table at the top pairs algebraic terms with decimal orders: numero with units, cosa (the unknown) with tens, censo (square) with hundreds, cubo (cube) with thousands, while a column below works twelve by twelve as one hundred and forty-four. The lower half is dominated by a tall pen drawing of paired links or rings plaited into a column, with a fainter interlace knot at the upper left. An arched line, read as a projectile's path, sweeps across the middle of the sheet. Faint show-through and further sketches are also present on the leaf.
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Algebraic terms matched to decimal places
A short table pairs the algebraic terms with place-values: numero with number (units), cosa with tens, censo with hundreds, cubo with thousands. It sets the unknown and its powers against the decimal orders of magnitude.
A squaring: 12 times 12 is 144
A small column of figures at the foot works a multiplication, twelve by twelve giving one hundred and forty-four. It stands apart from the table of terms above.
An interlaced column of rings
The lower half of the sheet is filled by a tall drawing of paired links or rings woven into a plaited column. A fainter interlace knot is sketched at the upper left.
An arched trajectory
An arched line sweeps across the middle of the sheet, read as the curved path of a projectile. It runs behind the woven column of rings.