Hi

I am going to close the system inside, so the air is going to be
resanable dry. However the sand I got might not be so dry, since I got
it from outside and it is coverd in snow. I am going to let it dry
(inside) for few days, at least until I have the weather to put my
geophone underground.

Regards.
-- 
Jón Frímann
http://www.jonfr.com
http://www.simnet.is/jonfr500/earthquake/

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