1778 - set up a school for children of all ages from "toddlers to unruly youths." 1785 - ran a school at Kendal. 1793 - was offered a post as professor of mathematics and natural philosophy at Manchester Academy. 1794 - achieved the extraordinary feat of detecting in himself and showing how to detect the fact that some people observed colours with more limited discrimination than others (colour blindness or Daltonism). 1803 - created the first rudimentary table of atomic weights. 1810 - declined election to the Royal Society. 1816 - elected as a member of the French, Académie des Sciences. 1822 - accepted election to fellowship of the Royal Society. 1826 - became the first recipient of the Royal Society's royal medal. 1831 - was present at the first meeting of the British Association for the Advancement of Science, held in York.