A booke named Tectonicon, brieflie shewing the exact measuring, and speedie reckoning all manner of land, squares, timber, stone, steeples, pillers, globes, etc. ... With other things pleasant and necessarie, most conducible for surueyers, landmeaters, ioyners, carpenters, and masons
A 1605 London measuring manual by Leonard Digges, the Tectonicon, written for surveyors, land measurers, joiners, carpenters and masons to reckon areas, timber, stone and solids. The pictures are small woodcut-style diagrams of polygons, a rectangle, a circle with chord and diameter, and a rhombus, each labelled with numerals and letters for worked calculations. A designer might take their clean geometric line work and the way numbers sit inside plain figures as a model for technical diagrams.
