واستناداً إلى تجاربه بواسطة الأجسام المشحونة، كان بريستلي من بين أول من اقترح بأن القوة الكهربائية تتبع قانون التربيع العكسي على غرار قانون نيوتن للجاذبية الكونية.May we not infer from this experiment, that the attraction of electricity is subject to the same laws with that of gravitation, and is therefore according to the squares of the distances; since it is easily demonstrated, that were the earth in the form of a shell, a body in the inside of it would not be attracted to one side more than another?</ref> ومع ذلك، لم يعمم أو يدقق في هذا الموضوع، وأُعلن عن القانون العام من قبل الفيزيائي الفرنسي شارل أوغستان دي كولوم في ثمانينيات القرن الثامن عشر.
Based on experiments with charged spheres, Priestley was among the first to propose that electrical force followed an inverse-square law, similar to Newton's law of universal gravitation.May we not infer from this experiment, that the attraction of electricity is subject to the same laws with that of gravitation, and is therefore according to the squares of the distances; since it is easily demonstrated, that were the earth in the form of a shell, a body in the inside of it would not be attracted to one side more than another?</ref> However, he did not generalise or elaborate on this, and the general law was enunciated by French physicist Charles-Augustin de Coulomb in the 1780s.