"The3rd Earl Of Derby" wrote in message
. uk...
Toller wrote:

Maybe I am not understanding you. If I put horizontal grain walnut in
between two pieces of vertical grain butternut it should crack when
the wood moves.
But maybe you meant something else...

How do you mean *Crack* ?

If you where to biscuit joint the new walnut section all round it
shouldn't
have any adverse effects on the wood.

"what I have always heard"
The butternut will want to move about a quarter of an inch (16" times
..2"/foot) from summer to winter. The walnut will not move at all. That
movement cannot be contained in the joint, which will crack to accomodate
it.