Dear friends,

John Lahr's wife, Jan, gave me much of John's earthscience activities and 
experiements.  I'm familiar with most of them, but there is one in 
particular that I could use some help on.  I have posted some pictures at 
http://www.oregonshakes.com/temp/Lahr/ for your review.

The device appears to be a torsion wave generator but I'm not familiar with 
torsion waves generated by earthquakes (which was John's primary focus). 
Could this be something else related to earthquakes?

Be sure to look at the move link on the website so that you can see it in 
action.
http://www.oregonshakes.com/temp/Lahr/MOV04260a.MPG

If any of you have ideas, please let me know.

Thanks so much,
Kay Wyatt


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