I am thinking this: https://en.wikipedia.org/wiki/A_Dynamical_Theory_of_the_Electromagnetic_Field https://en.wikipedia.org/wiki/A_Dynamical_Theory_of_the_Elec..

I am thinking this: https://en.wikipedia.org/wiki/A_Dynamical_Theory_of_the_Electromagnetic_Field https://en.wikipedia.org/wiki/A_Dynamical_Theory_of_the_Elec... :-)