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Fire Clay Temperature Indicator Cone in Stand, 1925-31

1925-1931

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931

Ceramic Temperature Indicator Cones and Stand, 1925-1931

1925-1931

Steel Specimens showing Colours for Tempering, 1801-1900

1800-1824

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931

Thermochrom Crayons (Pencils),. 1950-53

1950-1953

Fire Clay Temperature Indicator Cone, 1925-31

1925-1931
Portable thermistor pyrometer indicator (serial No. 92757 P1) in wooden case, by Salford Electrical Instruments Ltd., Salford, Greater Manchester, c.1952. Complete with thermistor and connecting leads. Range 0 to 150°c.

Portable thermistor pyrometer indicator (serial No. 92757 P1) in wooden case

1950-1952