[Cob] Test Bricks

[Janet Standeford]

Now I know the difference between mud bricks and cob. The site I 
originally dug up provided such a beautiful mix of sand and clay that as 
I kneaded it and then mixed in the straw, the feel of it was truely like 
a sticky bread dough.

Then I tried dirt from another area and it was lifeless and muddy 
instead of sticky. I made a brick from it anyway just to see the final 
result comparisons.

If I didn't already plan on building with it, I would be hooked anyway.

Does anyone know how long these should dry before testing strength? They 
are minis, actually round with one being three inches high and one being 
3-1/2. They are 3" in dia.