Thomas, try these
Dale

Bob Barns' article
http://www.seismicnet.com/calibrate.html

Erhard Wielandt article

http://jclahr.com/science/psn/wielandt/man2001.html


----- Original Message ----- 
From: "Thomas Dick" 
To: 
Sent: Saturday, July 26, 2008 12:08 PM
Subject: calibrating Lehmans


> Wasn't there an article on calibrating Lehman-type seismometers 
> usingWinQuake and a small weight hitting the mass? 

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