Rudimentary treatise on the erection of dwelling-houses, or, The builder's comprehensive director : explained by a perspective view, plans, elevations, and sections of a pair of semi-detached villas ... (1860)
Brooks, S. H. (Samuel H.) · London : J. Weale · leaf 119
91 PROPORTIONAL COMPASSES. its owner in saving both time and trouble. The pro- portional compasses consist of two equal and similarly- … to slide and fix the centre c in its proper place, and the opening of the small points e d at the other extremity. The centre consists of pivot or steel pin which passes through dove-tailed pieces of brass, nicely fitted to slide in the before-named slits, and also through a circular nut or collar…
House construction
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
