CONTACT GONIOMETER
F. PELLIN, LATE 19TH CENTURY
signed to the reverse F. Pellin Paris 21 the nickel-silver scale 0-180° divided to ½°, sliding contacts with brass screws
4in. (10cm.) wide
CONTACT GONIOMETER
F. PELLIN, LATE 19TH CENTURY
signed to the reverse F. Pellin Paris 21 the nickel-silver scale 0-180° divided to ½°, sliding contacts with brass screws
4in. (10cm.) wide
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