Cob: soil tests

[Amanda Peck]

The Hand Sculpted House mentions testing for enough sand by how it sounds 
when you squeeze a handful next to your ear.  In addition to how it cracks 
or doesn't crack. That's the first aural test I've heard of, and I do like 
the idea of using all our senses.


Darel asked (heavily snipped)
Does anyone have any other handy test ideas?



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