Hi Ted, well there is proof, the mind does go first... Now I remember that you did donate that system to the American School in Tokyo. What year was that? 93? At least I still remembered it had a knife edge. Have a good day-- Regards, Steve PSN Aptos, California -----Original Message----- From: ted@..........To: PSN-L Mailing List Date: Wednesday, February 16, 2000 1:48 PM Subject: Re: boom angle of horiz seis > > >Good memory, Steve! My original Lehman (long since gone, donated to Yamato >High School in Japan) used a knife-edge which required perfect adjustment >in order for the entire knife edge to contact the base. this adjustment >was made via the turnbuckle in the middle of the suspension wire. The >other newer designs are far superior but it worked well for a long time. > >Regards, Ted > > > > >_____________________________________________________________________ > >Public Seismic Network Mailing List (PSN-L) > >To leave this list email listserver@.............. with the body of the >message: leave PSN-L _____________________________________________________________________ Public Seismic Network Mailing List (PSN-L)
Larry Cochrane <cochrane@..............>