High-frequency chokes, 1900-1950
1900-1950
Two high-frequency chokes (coil inductors) in wood boxes, mounted on porcelain legs, made by Marconi's Wireless Telegraph Company Limited, Chelmsford, Essex, England, 1900-1950
Siemens dynamometer ammeter
Siemens dynamometer ammeter, in glass case, No.2778
Siemens moving iron ammeter
Siemens moving iron ammeter
Edison's electrolytic A-H. meter?
Edison's electrolytic A-H. meter?
Open pan salt making, handed-square salt pan and stove, 1842-1924
1924
Model, sectioned, scale 1:24, of "Handed Square" salt pan, stove and room, used for the manufacture of square blocks of salt with framed descriptive label coloured diagram (unframed) and two mounted photographs, 3 small barrows, 16 model tools, model salt boxes and salt blocks