I highly recommend a wire for the lower hinge. You can see the
details of how to make one here:
At 12:28 PM 6/12/2001 , you wrote:
I have read that a ball bering was used in place of a knife edge in the construction of the Lehman by some people. .....
or is this normal to see my construction go here :http://www.1goss.com/seis.htm
John C. Lahr1925 Foothills RoadGolden, CO 80402Phone: (303) 215-9913john@........http://lahr.org/john-jan/science.html
Larry Cochrane <cochrane@..............>