An Essay on the Application of mathematical Analysis to the theories of   Electricity and Magnetism
  Green's famous essay (Nottingham, 1828), with which he introduced the potential function, was transcribed from its reprint in Crelle's Journal (1850-54), with several typographical corrections and a reference section added. Green starts with accounts of earlier work, and some introductory remarks motivating his notation and method. Then, he gives a textual summary of later formal calculations, beginning with the general results. Finally, Green applies the results to several problems concerning electricity and magnetism. 
George Green