In a message dated 25/02/2005, meredithlamb@............. writes:

Yes....it would be very interesting to see the mechanical makeup of both  of 
these seismometers; or, how they mechanically/electrically "tick".   The only 
russian instrument on a search engine I found (article, with no  pictures) was 
a electroylte model. 



Hi Meredith,
 
    These are listed on the Princeton PEPP site. 
_http://lasker.princeton.edu/index.shtml_ (http://lasker.princeton.edu/index.shtml) 
    _http://quake.eas.gatech.edu/Instruments/InstrumentSurvey.htm_ 
(http://quake.eas.gatech.edu/Instruments/InstrumentSurvey.htm) 
    PMD is now at _http://www.eentec.com/_ (http://www.eentec.com/) 
    They are electrolytic devices.
 
    Regards,
 
    Chris Chapman






In a message dated 25/02/2005, meredithlamb@............. writes:
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Yes....it would be very interesting to see the mechanical makeup of b=
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  of these seismometers; or, how they mechanically/electrically "tick". =
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  The only russian instrument on a search engine I found (article, with no=20
  pictures) was a electroylte model. 

Hi Meredith,
 
    These are listed on the Princeton PEPP site. http://lasker.princeton.edu=
/index.shtml
    http:/=
/quake.eas.gatech.edu/Instruments/InstrumentSurvey.htm
    PMD is now at http://www.eentec.com/
    They are electrolytic devices.
 
    Regards,
 
    Chris Chapman