<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; = charset=iso-8859-1"> <META content="MSHTML 6.00.2900.2769" name=GENERATOR> <STYLE></STYLE> </HEAD> <BODY bgColor=#ffffff> <DIV><FONT face=Arial size=2>Wood is petrified through a process of = mineral replacement. Once petrified, the object that was once wood becomes rock. Petrification occurs over a very long period of = time - thousands/millions of years. It can occur when wood is buried in = the ground and groundwater migrates through it - it is the groundwater carrying = dissolved minerals that is the vehicle for wood petrification.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2><A href="http://www.americansouthwest.net/arizona/petrified_forest/geology= .html">http://www.americansouthwest.net/arizona/petrified_forest/geology.= html</A></FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Wood does not become petrified in a = functioning, non-buried piano. Period.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Terrence M. Farrell, = P.G.</FONT></DIV> <DIV><FONT face=Arial size=2>Licensed Professional = Geologist</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=jstuchell@verizon.net = href="mailto:jstuchell@verizon.net">jonathan stuchell</A> </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">Pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 03, = 2005 2:22 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Re: Petrifying process = of wood</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial = size=2>          &nbs= p;      Isnt it mainly a matter of time leading to petrification?  That would = be like trying to sober up a drunk quicker !</FONT></DIV> <BLOCKQUOTE dir=ltr style="PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; = BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px"> <DIV style="FONT: 10pt arial">----- Original Message ----- </DIV> <DIV style="BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: = black"><B>From:</B> <A title=quentin.codevelle@tiscali.fr href="mailto:quentin.codevelle@tiscali.fr">Quentin Codevelle</A> = </DIV> <DIV style="FONT: 10pt arial"><B>To:</B> <A = title=pianotech@ptg.org href="mailto:pianotech@ptg.org">pianotech</A> </DIV> <DIV style="FONT: 10pt arial"><B>Sent:</B> Saturday, December 03, = 2005 1:21 PM</DIV> <DIV style="FONT: 10pt arial"><B>Subject:</B> Petrifying process = of wood</DIV> <DIV><BR></DIV> <DIV><FONT face=Arial size=2>Hi List,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Some months ago, we evoked the = petrifying process of wood in the soundboard, resulting a loss of vibration = ability, and thus a loss of power.</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Where can I find another = information about this? </FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Can this petrification be = accelerated because of humidity and temperature conditions, or even because of = the playing of the piano?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>At what age can a soundboard be = considered as "petrified", so that it has to be changed to get a good sound out of = the piano?</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Thanks,</FONT></DIV> <DIV><FONT face=Arial size=2></FONT> </DIV> <DIV><FONT face=Arial size=2>Quentin</FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BODY></HTML>