I just looked at the problem in the Fermi way and solved it and then I wrote it down. The Handbuch article, people described in this way; that I had a stack of white paper on my left side and I filled it and then put it on my right side and at the end of the day the stack was on the right side.

[Q] And the stack was then sent on to the typist.

Yes.

[Q] And that essentially was more or less the final manuscript?

Yes, more or less. Yes, I think in those days I didn't change terribly much after it had been typed, I changed a little bit before it went to the typist. Nowadays, these papers go through three, four, five revisions and I correct the formulae and I correct the writing - but that's old age.

[Q] But it's also the world of word-processors and it's easier to make corrections than it was.

It's much easier, yes.

[Q] And, so in... you come back and you're again an assistant at Sommerfeld's. You mentioned Henneberg. You said there was a second student that you...

Yes, a second student named Voss who met me again after the war, but I have much less to say about him. I don't even know what it was I gave him as a thesis. But he did finish his Doctors degree.

[Q] And at that stage you're already a Privatdozent, and therefore you can take...

Yes, I gave lectures, I guess about collision theory and I have the report of the university about the tuition payments that the students had made. It was the custom taken still from Middle Ages that the students had to pay, I don't know, 10 Marks apiece for attending a lecture, and so I got some hundred-odd Marks from the students from which then was deducted the income tax and several other things. And there is a very impressive statement from the university treasury paying me the 115.00 Marks which came out.