Jim, I'd like to have a copy. Right now I'm collecting as many ideas as I = can find. Since I live in a "seismicaly deprived" region (Central NY), = I'm interested in sensors that are suitable for teleseismic events. Larry ----- Original Message -----=20 From: Connie and Jim Lehman=20 To: psn-l@................. Sent: Thursday, December 19, 2002 10:48 AM Subject: Vertical design/1-sec Larry C & others-- About 10 year ago at James Madison Un. we devised a vertical = instrument--made mostly from hardware store items--I wrote the design up = and will be glad to send anyone a copy of construction details. The = unit is now in the Moravian College seismic center in Bethlehem PA. Write me a note at: J. Lehman Physics Dept., James Madison Un. Harrisonburg, VA. 22807Jim,I'd like to have a copy. Right now I'm = collecting as=20 many ideas as I can find. Since I live in a "seismicaly deprived" = region=20 (Central NY), I'm interested in sensors that are suitable for = teleseismic=20 events.Larry----- Original Message -----From:=20 Connie and=20 Jim LehmanSent: Thursday, December 19, = 2002 10:48=20 AMSubject: Vertical = design/1-secLarry C &=20 others--About = 10 year ago=20 at James Madison Un. we devised a vertical instrument--made mostly = from=20 hardware store items--I wrote the design up and will be glad to send = anyone a=20 copy of construction details. The unit is now in the Moravian = College=20 seismic center in Bethlehem PA.= Write me a=20 note at:&nbs= p; =20 J. Lehman Physics Dept.,&nbs= p; =20 James Madison Un.&nbs= p;  = ;=20 Harrisonburg, VA.&nbs= p;  = ;=20 22807