Cob RE: Salt in the floor

[goshawk at gnat.net]

While reading the great booklet "build your own Earth oven" 
I noticed a section that mentions "that salt helps keep the heat in 
the over where you want it" Thus suggests using coarse salt as part 
of the sub floor for the cob oven. MMMM 
I think could one use this to help the floor of a cob structure also 
retain heat. One small little fact I don't know is how much one of 
those 50lb bags of salt cost.  I figure if it didn't cost too much 
and it might even help keep down insects. 

Pat
& the Maukly crew.

(building note: (for those who might be following this adventure))
I hope to drop the form I my first "superadobe vault". It's about 6 
foot long at the base and 8 foot long at the top. It's four feet 
wide. The walls are about 16 inches thick. I'll have photos in a few 
weeks.) 

"In the beginner's mind there are many possibilities, 
 but in the expert's there are few."
                                    Zen Mind, Beginner's Mind