 Not believing the offer was sincere, Green did not contact Bromhead for two years.Upon publishing the work, he first introduced the term 'potential' to denote the result obtained by adding the masses of all the particles of a system, each divided by its distance from a given point; and the properties of this function are first considered and applied to the theories of magnetism and electricity.This was followed by two papers communicated by Sir Bromhead to the Cambridge Philosophical Society