Article View: sci.bio.botany
Article #125Re: Preserving tree slices
From: Eric Stevens
Date: Fri, 21 Sep 2001 01:20
Date: Fri, 21 Sep 2001 01:20
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3373 bytes
On Thu, 20 Sep 2001 09:52:15 GMT, dr_smug@yahoo.co.uk (Ken Baker) wrote: >Hi: > >I'd like to preserve a slice from a large tree which was just cut >down, and I wondered what the best way of drying the slice was to >prevent cracking? > >The tree was a Horse Chestnut (conker) tree, if that makes any >difference. Yes it does, but I don't know in which way. Part of your problem is that all wood shrinks on drying and heart wood wood and sap wood shring by different amounts. This can lead to longitudinal splitting of the timber. Such splitting can occur anyway if the outside layers are dried and shrink before the inside has dried and shrunk. There are other problems such as cell collapse which can also cause distortions of the dried timber. The variation in the rate of permeation of water vapor from with different types of wood mena that while some woods dry fast easily, others have to be dried very carefully over a long period of time with all kinds of clamps and weights to stop them from warping. Unfortunately I know nothing about drying chestnut. Your situation is unusual in that your slice is in effect a very short log with ends but no middle section. To get an idea of the general problems see http://www.google.com/search?q=cache:pGfw9Fvy53E:www.exnet.iastate.edu/Publications/PM329.pdf+drying+wood+chestnut&hl=en > >Any dendrochronologists (or anybody) able to give me advice? > > >Many thanks in advance.. > > >Ken. Eric Stevens There are two classes of people. Those who divide people into two classes, and those who don't. I belong to the second class.
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1129f3,f38385e6b97128ea X-Google-Attributes: gid1129f3,public X-Google-Thread: 10bcbe,f38385e6b97128ea X-Google-Attributes: gid10bcbe,public X-Google-Thread: 106b31,f38385e6b97128ea X-Google-Attributes: gid106b31,public X-Google-ArrivalTime: 2001-09-20 18:21:07 PST Path: arc1-ca.pugleaf.net!archiver1.google.com!newsfeed.google.com!newsfeed.stanford.edu!news-spur1.maxwell.syr.edu!news.maxwell.syr.edu!news.stealth.net!204.127.161.2.MISMATCH!wn2feed!worldnet.att.net!216.166.61.6!nntp2.aus1.giganews.com!nntp.giganews.com!nntp3.aus1.giganews.com!bin1.nnrp.aus1.giganews.com.POSTED!news.clear.net.nz From: Eric Stevens <stevense@clear.net.nz> Newsgroups: sci.bio.botany,bionet.agroforestry,sci.archaeology Subject: Re: Preserving tree slices Organization: Forensic Engineer Message-ID: <k95lqt09dirh5j16f8nn515ql0lhosuto9@4ax.com> References: <3ba9bb76.11111010@news.cable.ntlworld.com> X-Newsreader: Forte Agent 1.8/32.548 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Original-NNTP-Posting-Host: 203-167-163-209.dialup.clear.net.nz X-Original-Trace: 21 Sep 2001 13:20:46 +1200, 203-167-163-209.dialup.clear.net.nz Lines: 45 NNTP-Posting-Date: Thu, 20 Sep 2001 20:20:51 CDT X-Trace: sv3-7AWD8h0EsTLVMVc2TlrRXhbxepL3lkCfDcO5WqpDVQjwazivzQZCMnEDSmbtqFxqXcoINQXB/a4Okhe!RePtjXzeZygt3oOeZaEUemxJXyfJG1J57gIGdSuvdK59NVOpjTqH1Qy1O9HPVXdtB+T/nk0J7lIY!s+A3SA== X-Complaints-To: abuse@GigaNews.Com X-DMCA-Notifications: http://www.giganews.com/info/dmca.html X-Abuse-Info: Please be sure to forward a copy of ALL headers X-Abuse-Info: Otherwise we will be unable to process your complaint properly Date: Fri, 21 Sep 2001 01:20:51 GMT