Hill profile (Montici, Edna) with column multiplication
Black-chalk topographic profile beside a worked multiplication in ink
A black-chalk profile of rolling wooded hills fills the page, drawn as a topographic study of the country around Florence, with mirror-script labels naming Montici and Edna along the central ridge. In the upper-right corner a separate block of ink figures works a multiplication in columns, 640 by 16 giving 10240, together with its division check. The sheet combines the landscape survey of the neighbouring folios with an unrelated arithmetic jotting.
On this page
Named localities: Montici, Edna
Two place-labels are written vertically down the centre of the drawn ridge, naming Montici and the locality of Edna. As on the neighbouring sheets, the names anchor the landscape profile to real points in the topographic survey.
Column multiplication of 640 by 16
In the upper-right corner a column of figures works the product of 640 and 16: the partial products 3840 and 640 (shifted) are summed to 10240, and the result is checked by dividing 10240 back by 640 to recover 16. It is a plain arithmetical jotting set apart from the drawing.