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Thermopile used to measure heat production, England, 1930-1940

1930-1940
Guided weapon timing switch GW4 MK1 T.D.S.

Guided weapon timing switch GW4 MK1 T.D.S.

1950-1960
Infra-red foot bath, `Chirpo' model, with instruction leaflet, by Holland, 1940-1960

Infra-red foot bath

1940-1960
Set of small test cones and one hemisphere which have been subjected to intense heat to simulate re-entry ablation for nose cones of ballistic missiles.

Small test cones from re-entry ablation simulation

1955-1965
"Chirpo" infra-red foot bath, by Holland, 1945-1965

Infra-red foot bath, `Chirpo' model

1945-1965