as a visiting prof in '64?), Lehrer presented the final class session in
one of the undergrad physics courses.

Anyway, the class met in a physics lecture hall like Varian 100 or 101 in
the Tank, with electrically operated blackboards.  When this last special
session was held, the lecture table had been rolled out, and a grand piano
rolled in.  The electric blackboards had been painted with colored chalk
to look exactly like the proscenium and curtains at the Boston Symphony.
The room was packed with everyone in the Department.

Lehrer came in, in tails as I remember, dramatically punched the button that
made the "curtains" go up, underneath was written in large letters "The
Physical Revue", and he began an hour's worth of just that.  Besides the
"Derivative Song" (I think), there was certainly the "Periodic Table" song,
Lobachevsky, and a round, sung with four associates, which I've never
encountered since, which had Lehrer as professor and the others as students
singing

Now then, are there any questions?    (G G G-G-G-G E C)
Now then, are there any questions?    (ditto)
If there are none,                    (C C C A)
Then I am done			(C C C G)
(And I have nothing more to say-ay)	(E D C B D C A D C)

(Last line not sure about, and also the music may be wrong)

First student:

Man, he asks if there are questions
Man, I've got a million questions
I've got a ton,
And every one,
Would take a half a day to ans-wer.

There may have been more verses; I don't remember.  If someone else knows
of this, I'd be delighted to hear of a place to locate it.  (It may have
been a follow-on to the "Professor's Song"?)

The only other Lehrer in my repertoire is "An awful debility, a lessened
utility, a loss of mobility, is a strong possibility,..." ...which
unfortunately begins to strike closer to home every year...