From: utzoo!decvax!watmath!dmmartindale Newsgroups: net.misc Title: Re: The Barometer Story Article-I.D.: watmath.2522 Posted: Thu Jun 3 11:24:47 1982 Received: Sat Jun 5 04:30:01 1982 References: tekcad.136 I would think that many of the unorthodox methods proposed for measuring the height of the building are potentially much more accurate than measuring air pressure differences with a barometer. Air density (and thus pressure change with altitude) varies quite a bit with temperature; wouldn't you need to have a complete knowledge of the air temperature between ground level and the top of the building in order to get an accurate answer?