細節
A LATE 18TH-CENTURY EBONY, BRASS AND BONE VERNIER OCTANT BY DRING & FAGE
signed on the cross-bar Dring & Fage, 6 Tooley St. London Bridge, 13½in. radius brass index arm, interchangeable shades, scale divided to 100° (losses, shrinkage) -- 15in. (38cm.) high overall; together with a late 19th-Century gilt-brass pocket aneroid barometer signed T & H Doublet (2)