Unpublished paper, 'On the agency of the electro-magnetic principle in giving movement and impulse to the planetary system' by Edmund Cartwright Cartwright seeks to explain the motion of the planets around the sun using electromagnetic principles and the combination of positive and negative energies. Includes postscript addressed to Sir Humphry Davy dated 15 June 1822. A graphite inscription on the first page reads 'Archives unpub 1822'. Subject: Astronomy / Physics Read to the Royal Society 27 June 1822. [1822]