.jpg?w=1)
BECKER, EARLY 20TH CENTURY
細節
AN ENGLISH GONIOMETER
BECKER, EARLY 20TH CENTURY
the Wollaston-type goniometer signed on the telescope BECKER LONDON, the vertical circle divided to 0.5° with vernier scale, articulated specimen holder, supported on cast iron stand on fitted wooden base with carrying box
12in. (30cm.) wide
BECKER, EARLY 20TH CENTURY
the Wollaston-type goniometer signed on the telescope BECKER LONDON, the vertical circle divided to 0.5° with vernier scale, articulated specimen holder, supported on cast iron stand on fitted wooden base with carrying box
12in. (30cm.) wide