124. Curves Drawn with Twin Elliptic Harmonograph, made at Rugby in winter of 1900-1901, with further loose figures as well as a scrapbook of test figures, 24 pages with multiple figures on each, owner’s inscription front free endpaper, contemporary half morocco, upper board detached, lower hinge cracked, worn, extremities rubbed, folio, 1900-1901.
est. £100 – £150