20132-0000 Musée des arts et métiers-CNAM (Paris France)
Suggestions & Corrections
Type:
instrument
Dimension:
L.: 27; Diam.: 2,5
Component's data
Thematic group:
Instruments
Type:
apparatus
Abstract:
Brass capped glass tube, with spherical brass caps at ends and inner spiral of round pieces of tin foil affixed to internal surface of tube. Tin foil pieces do not touch one another