George Washington's Two-Foot Gunter

Source

Two Feet, Two Folds, Boxwood Slide Rule, Gunter's

His [George Washington's] expense accounts show that on September 20, 1747, he buys himself a two-foot Gunter for 1/8. This was probably the common flat drawing scale or rule, usually an inch and a half broad, divided and ruled to various measures relating to surveying, navigation, trigonometry, etc., used chiefly by surveyors. From the Magazine Of American History....