...leaves me pie-eyed (and I'm pleased to say I figured it out all by my lonesome, without having to look at the end of the MvS column).

How I want a drink - alcoholic, of course - after the heavy chapters involving Quantum Mechanics.

Here's a VERY heavy hint, if you want: http://members.chello.nl/r.kuijt/pi_onthouden.htm. Even if it is in Dutch.