Phase II Standard Ratio for use in bridge measurement, made by H. Tinsley & Co., London (UK), no. 14554. Part of the equipment used by the Metrology Department at UMIST. Standard ratio for use in bridge measurement
Phase II standard cell Weston type 1149, made by H. Tinsley & Co., London (UK), circa 1935. no 109157. Marked in black paint "54 EE 1331B". Part of the equipment used by the Metrology Department at UMIST. Standard cell Weston type 1149
Weston normal cell (photo-electric), Cadmium type, with glass fronted case, serial no. 14862, by H. Tinsley and Co., London, England, 1926. Weston normal cell (photo-electric)