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Mercury in glass thermometer, graduated -5.5(0.1)50.2, 99(0 Science Museum Group © The Board of Trustees of the Science Museum
Mercury in glass thermometer, graduated -5.5(0.1)50.2, 99(0.1)101, etched Baird and Tatlock (London) Ltd "Jena Normal 16 III glass" 16099 NPL 10-14, 1910