> IMHO, it is cooking salt that varies in layers and not sea salt
> as per one chemist's opinion. Sea salt is homogenous when
> dissolved.

?

If cooking salt is pure NaCl then you'd expect that to be the
salt that didn't layer.

Have you tried varying other factors - for example substituting
a resistor for the solution to see if the drift still occurs

Joe



-----
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4765 / Virus Database: 4015/8190 - Release Date: 09/10/14

--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.