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Daily Herald Photograph: Steeplejack testing a bosun's chair

Daily Herald Photograph: Steeplejack testing a bosun's chair

1955-01-07
Frog board with crank lever myograph

Frog board with crank lever myograph

circa 1968
Daily Herald Photograph: Postwar temporary housing

Daily Herald Photograph: Postwar temporary housing

1945-02-19
Physiological-mechanical recording lever, with string attached, probably by C.F. Palmer, London, c.1925

Physiological-mechanical recording lever

circa 1925
Coherer tapper; rare

Palmer coherer tapper

1900-1915
Pointer for smoked-paper recording drum (kymograph), probably by C.F. Palmer, London, 1920-1960.

Pointer for Smoked-Paper Recording Drum (kymograph)

1920-1960
Patented and made by F W Baxter, Brixton, London, BP25463-1912. Sold by Griffin. Pneumatic delay valve. In original carton.

Fortex Time Valve