20089-0000 Musée des arts et métiers-CNAM (Paris France)
Suggestions & Corrections
Type:
instrument
Dimension:
H.: 35; L.: 23,2; Diam.: 14; Mass: 1100 g.
Component's data
Thematic group:
Instruments
Type:
apparatus
Abstract:
Triangular glass prism, bound in brass at each end, supported horizontally in wooden frame attached to wooden upright with brass hinge for rotation. The wooden base is much decayed and broken.