The Dept.of Trade Patent Office,
State House,
High Holborn,
LONDON. WC1.
29th August, 1990.
Dear Sir,
I wonder if you can help me: I am trying to discover whether anybody has ever come up with a way of switching off a perpetual motion machine.
I've had one running in the tool shed for quite a while now and can't figure out how to turn the damn thing off - it's turning into a real nuisance and the neighbours have started to complain about the racket it's making.
Yours sincerely,