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Artificial leg, Europe, 1914-1918

1914-1918

Early Platinum Electrical Resistance Thermometer, 1871-1890

1871-1890

Early Platinum Electrical Resistance Thermometer, 1871-1890

1871-1890

Early Platinum Electrical Resistance Thermometer, 1871-1890

1871-1890

Early Platinum Electrical Resistance Thermometer, 1871-1890

1871-1890

Early Platinum Electrical Resistance Thermometer, 1871-1890

1871-1890

Callendar Electrical Temperature Indicator, 1894

1894
Platinum rhodium thermocouple with one fireclay sheath, by Cambridge Instrument Company Limited, London, England, 1925-29.

Platinum Rhodium Thermocouple, 1925-29

1925-1929
Bitumen from the Great Pitch Lake, Trinidad

Bitumen from the Great Pitch Lake, Trinidad.

Length of fibre-optic cable, by STC Submarine Systems, from the UK-Belgium 5 cable laid by CS Alert in 1986

Length of fibre-optic cable, by STC Submarine Systems

1986