A cast iron circular base with tripod legs on levelling screws and in between two of the legs there are two metal terminals. The circular base holds a circular magnet. The magnet has a metal post attached to it on which there is a 2x8cm flat glass window with a small circular mirror behind it. On the circular base there are markings “IIE” and “1212”.
Accession Number: 2009.ph.191
Primary Materials: Metal, Glass
On top of the flat glass is a circular metal plate with labels “GRIFFIN & TATLOCK LIMITED LONDON”, “EDINBURGH, GLASGOW, MANCHESTER, LIVERPOOL”, and ” NoG 735185″
Height = 23.5, Width = 18.5, Length = 19.5
Function: Precision electrical measurement.
Manufacturer: Griffin & Tatlock Limited
Date of Manufacture: 1929-1954
Provenance: Dr. Martin Lee’s Collection
Additional Information and References: