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EDITORIAL USE ONLY: A preserved lock of hair and, under glass,  the preserved eyeballs of John Dalton (1766-1844), resting on a letter written by him.  Dalton is best know for his work on the natural laws governing the behaviour of gases (Daltons's Law) and of his insights into the theory of atoms and their relative atomic weights. As he also had a colour vision condition and produced papers on the topic the term 'Daltonism' became synonymous with many forms of colour-blindness. Property of the Manchester Literary & Philosophical Society.