I just wanted to let you know that I posted the Sprengnether 201 manuals 
and two old (1956 & 1936) Coast and Geodetic  Survey booklets to my 
site.  The booklets are interesting for the photos of old seismometers 
and info for setting up a site.  It's address is 
http://home.earthlink.net/~dwebb002/  .  Note that I haven't figured out 
how to link in my embedded genealogy site.

Dick Webb
Raleigh, NC
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