Cob Re.cob fireplace

[Patrick Newberry]

No He wasn't yarning at all!
The warning I heard most was to watch out for river rocks.
I have experienced a situation where we were doing a sweat lodge 
with some rocks with found and the rocks gave off a horrible smell 
and made our lungs burn from the oder of the hot rocks.


> 
> Testing the rocks sounds like a good idea.  You may also want to avoid
> certain kinds of rocks, too.  I'm going _way_ back into my memory here, but
> I remember my father (who's a bit of a geologist given the moment) talking
> about some rocks with air or water pockets inside them (presumably volcanic
> rocks) which become heated when used in fireplaces and consequently
> explode.  Sometimes this is just a dull crack, other times it's much more
> impressive (or not, if it's in your fireplace).
> But then, maybe my father was just yarning away a bit?
> 
> Cheers, Rog.
> 
> 
"There is No Hope, but I may be wrong."