L'arithmetique en sa perfection
L'arithmetique en sa perfection is a 1687 Paris arithmetic textbook by François Le Gendre, printed by A. Besoigne, for students learning practical measurement and geometry. The pictures are plain geometric diagrams in brown-tinted print: a semicircle with a triangle inscribed, similar triangles with side lengths, an ellipse with axes, and a quadrilateral, each labelled with numbers and letters; a designer might borrow their clean line-and-label diagram style for technical or instructional graphics.
