Grace's Guide is the leading source of historical information on industry and manufacturing in Britain. This web publication contains 148,095 pages of information and 233,633 images on early companies, their products and the people who designed and built them.
The Physical Society of London, England, existed from 1874 to 1921.
It was a scientific society and produced the Proceedings of the Physical Society of London.
In 1921 the society became the Physical Society and in 1960 it merged with the Institute of Physics (IOP). 
Founded by William Chandler Roberts-Austen and others.
Past Presidents include;