A booke named Tectonicon; briefly shewing the exact measuring

and speedie reckoning all manner of land, squares, timber, stone, steeples, pillers, globes, &c. Further, declaring the perfect making and larg use of the carpenters ruler, containing a quadrant geometricall: comprehending also the rare use of the squire. And in the end a little treatise adjoyning, opening the composition and applyancy of an instrument called the profitable staffe. With other things pleasant and necessary, most conducible for surveyers, land-meaters, ioyners, carpenters, and masons.

by Leonard Digges