Joseph Black visiting James Watt in his Glasgow workshop, c1760 (c1879). Artist's impression of Joseph Black (1729-1799), Scottish chemist, visiting James Watt (1736-1819), Scottish inventor and engineer, in his workshop in the precincts of Glasgow University where he was instrument maker to the university. FromLes Merveilles de la Science, Louis Figuier, (Paris c1879).
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