Description

Three Columns in a Substantial Drafting Tool, probably English, 18th century. Measuring 7-1/16″ (18 cm) along each of the orthogonal sides, this substantial brass square is pierced and engraved, on both sides, with three shaped columns and with twin scroll supporters. At the base of each column is an opening usable for plumb bob, hung by string from a hole at the intersection of the three column centerlines. The long side of the triangle is truncated, giving leveling bases for each of the plumb line positions. Condition is very fine, noting some spotting to the reverse. A lovely tool for the architect or draftsman, the only one of this form we have seen.