Return-Path: <@segate.sunet.se:LOJBAN%CUVMB.BITNET@BITMAIL.LSOFT.COM> Received: from segate.sunet.se by xiron.pc.helsinki.fi with smtp (Linux Smail3.1.28.1 #1) id m0syOTn-0000ZSC; Thu, 28 Sep 95 21:18 EET Message-Id: Received: from listmail.sunet.se by segate.sunet.se (LSMTP for OpenVMS v0.1a) with SMTP id 14384B77 ; Thu, 28 Sep 1995 20:18:46 +0200 Date: Thu, 28 Sep 1995 11:03:29 -0600 Reply-To: Chris Bogart Sender: Lojban list From: Chris Bogart Subject: Re: Rotation To: Veijo Vilva Content-Length: 638 Lines: 12 >>How can one identify the north end of a symmetrical object? The head of a >>slot screw is the same is rotated by 180 degrees - the north and south ends >>cannot be discerned. > >No, I think he meant that the head of the screw would be considered the north >pole vs the point as the south pole with the axis being the long dimension >of the screw , now its rotation can be described in >relation to being with or against the rotation of the earth. Oops, I assumed "slot screw" meant some weird kind of screw where you can't tell the head from the point. If he just meant a regular screw, then you're right, my system would work fine.