From cube-lovers-errors@mc.lcs.mit.edu Mon Nov 23 13:45:28 1998 Return-Path: Received: from sun28.aic.nrl.navy.mil (sun28.aic.nrl.navy.mil [132.250.84.38]) by mc.lcs.mit.edu (8.9.1a/8.9.1-mod) with SMTP id NAA18663 for ; Mon, 23 Nov 1998 13:45:28 -0500 (EST) Message-Id: <199811231845.NAA18663@mc.lcs.mit.edu> Precedence: bulk Errors-To: cube-lovers-errors@mc.lcs.mit.edu Mail-from: From cube-lovers-request@life.ai.mit.edu Fri Nov 20 22:15:27 1998 Date: Fri, 20 Nov 1998 22:13:38 -0500 (EST) From: Nicholas Bodley To: Jerry Bryan Cc: "Jorge E. Jaramillo" , cube Subject: Re: Re : The Cylinder In-Reply-To: Uwe Meffert had a printed color catalogue around 1985 that showed some very interesting moving-piece "group theory" puzzles (is that a proper term?). Although I have a copy safely stashed somewhere, I don't know where. I'm just about sure that one was a cylinder, possibly in three layers like layer cake; it also, iirc, had maybe three more "cutting planes" that were spherical sectors bounded by the cylinder. Rotating the pieces would exchange top and bottom. |* Nicholas Bodley *|* Electronic Technician {*} Autodidact & Polymath |* Waltham, Mass. *|* ----------------------------------------------- |* nbodley@tiac.net *|* The personal computer industry will have become |* Amateur musician *|* mature when crashes become unacceptable. --------------------------------------------------------------------------