In a message dated 2008/07/26, dickthomas01@............. writes:

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

Hi Tom,

       There was an article which used a paper clip and a 90 degree V of 
cotton thread to apply a known small force to the arm. You applied a match to burn 
the thread and release it.

       Regards,

       Chris Chapman   
In a me=
ssage dated 2008/07/26, dickthomas01@............. writes:



Wasn't there an article on cali=
brating Lehman-type seismometers 

usingWinQuake and a small weight hitting the mass? 




Hi Tom,



       There was an article which used a paper=
 clip and a 90 degree V of cotton thread to apply a known small force to the=
 arm. You applied a match to burn the thread and release it.



       Regards,



       Chris Chapman