Cob cob and cisterns

[goshawk at gnat.net]

>
> >Doesn't Khalili fire some ceramic structures from the inside, ....

Yes the ceramic structures are fired from the inside. 


>     Also, my cob swauna does not have an exhaust hole designed into the
> structure.  I thought of putting one in, but in my experience with sweats,
> there has never been a "chimney,"  Plus,  where the chimney would be is
> exactly where the key cob goes.  This locks in the whole structure, much
> like a key brick or key stone in an arch.  And... I suspect like a key ice
> block on an igloo.

Actually you could leave a hole in the center if you wanted to but it 
would not be neccessary.  The top (aka key stone) is neccessary in an 
arch, but a dome does not require the top to be sealed. 
L&L
Pat
& the Maukly crew
email: goshawk at gnat.net
http : http://www.gnat.net/~goshawk