John Dalton 1766-1844 taught natural philosophy and mathematics at the Academy on this site 1793-1800. His Atomic Theory was first presented on 21st October 1803 to the Manchester Literary and Philosophical Society of which he was President 1816-1844

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Frankie Roberto on Flickr

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by Royal Society of Chemistry

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See also...
Nick Harrison on Flickr
Nick Harrison on Flickr
Nick Harrison on Flickr
flipflopnick on Flickr
Spudgun67 on Wikimedia Commons