细节
A rare early 19th-century brass goniometer,
signed Cary London with engraved scale and vernier read-out, with twin adjusting wheels, raised on an inverted vee-frame, on mahogany plinth base (cut at edge), with plush-covered ebonised base and glass dome 7¼in. (18.5cm.) high
See Illustration
signed Cary London with engraved scale and vernier read-out, with twin adjusting wheels, raised on an inverted vee-frame, on mahogany plinth base (cut at edge), with plush-covered ebonised base and glass dome 7¼in. (18.5cm.) high
See Illustration
出版
This Wollaston-type reflecting goniometer is illustrated in Phillips Mineralogy Pub. 1819