Photograph: Scientific Department
23 Mar 1981
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Contact sheet. Wang 2200 general computing system, a hand held calibrating electronic hygrometer in front of Hans Baldung's 'Portrait of a Man' (NG245) and an electronic impedance hygrometer mounted on the wall beside Lucas Cranach's 'Saints Christina and Ottilia' (NG6511). See also: National Gallery Technical Bulletin, 1981, Vol. 5, pp. 5-7. Photograph: National Gallery. No neg. details.
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