Solvay Conference 1927, with Langevin presiding

JAN 01 1927

The 1927 Solvay Conference photograph, the most famous group portrait in physics; Paul Langevin sits at the right-hand end of the front row, having chaired the meeting. It places the author of the theory of diamagnetism inside the founding generation of quantum mechanics - which is exactly where the diamagnetism story goes next.