Optical instrument
Category
Technological items
Date
Unknown
Materials
Metal and glass
Measurements
20 mm (Depth); 128 mm (Length)
Collection
Tyntesfield, North Somerset
NT 12197.1
Summary
An optical instrument, possibly a periscope, with adjustable focus. There is a refracting mirror at the end of a cylindrical tube which is marked 40x,50x and 60x.
Provenance
Purchased from the estate of the late Lord Wraxall with the assistance of the NHMF and donations from members and supporters.