From: utzoo!decvax!duke!harpo!utah-cs!utah-gr!thomas
Newsgroups: net.physics
Title: Re: perpetual motion puzzle?
Article-I.D.: utah-gr.686
Posted: Sun Jan 16 22:00:49 1983
Received: Wed Jan 19 04:24:20 1983
References: fortune.726

Yeah, it's easy - the pieces of plastic have gear teeth around the edge,
and are rotated at the correct rates.  (I.e., there is one piece of
plastic for each hand.)
=Spencer