Rudimentary treatise on the erection of dwelling-houses : illustrated by a perspective view, plans, elevations, and sections of a pair of semi-detached villas ... (1896)
Brooks, S. H. (Samuel H.) · London : C. Lockwood and Son · leaf 97
Bow Compasses. These are a small pair having a point either for ink or pencil. They are used to describe small arcs or circles, which they do more conveniently than large compasses, not only on account of the size, but also from the shape of their head, which rolls easily between the fingers and… … spring at the upper part corresponding with the joint a in Fig. 1. The spring of the two blades is then kept in obedience by an adjusting screw d, by which the two points may be set to any required degree of minuteness, and very small circles maybe described with a precision
House construction
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
