So this same room also had the physics journals and so it was a very... very much a family of people.

[Q] And the physics journals at that stage would be primarily...?

The physics journals were Annalen der Physik and Zeitschrift für Physik in Germany, and then The Proceedings of the Royal Society and The Physical Review.

[Q] You actually did receive The Physical Review already then?

Yes.

[Q] And the other person in Munich at that time is Willy Wien. I mean, just to...

Yes, Willy Wien was the Professor of Experimental Physics, a very famous person who had discovered that the maximum of the spectrum of a hot body shifted according to temperature. When it got hotter the spectrum got bluer, and that was one of the bases of Planck's discovery of quantum theory in 1900. So Willy Wien was a famous man, then mostly interested in so-called canal rays, that is rays of positive particles, protons, and investigating their properties, and he was known as a rather severe examiner in PhD examinations. For instance he almost flunked Werner Heisenberg because Heisenberg had not paid enough attention to experimental physics.

[Q] And microscopes in particular.

Microscopes. Yes, well the examiner had to ask three questions, so he asked Heisenberg about an astronomical telescope, a terrestrial telescope and a microscope, and Heisenberg couldn't answer any of them. After which he was justified in failing him, and it made a great impression on Heisenberg so that later he invented the gamma ray microscope to illustrate the uncertainty principle.