The theory and practice of surveying : containing all the instructions requisite for the skilful practice of this art
A surveying manual by Robert Gibson, revised by Daniel Peck Adams and printed in New York by E. Duyckinck in 1814 for working surveyors and students of practical geometry. The single indexed plate is a folding engraved table that divides into ruled cells, each holding a small lettered right-angled triangle above its trigonometric solution, giving designers a ready grid of diagram-and-formula units with engraved line work and italic captions.
