I have done some Google searches and can find no evidence that there is
a difference between hemispheres. In fact a couple of papers from Chile
and South Africa would seem to suggest that their hardwoods work the
same as in the north.

I did however find one reference that says that the coriolis effect does
change the direction of spiral grain

Does anyone have access to the books that Mike O'Donnell lists in his
bibliography?

--
Derek Andrews, woodturner

http://www.seafoamwoodturning.com
http://chipshop.blogspot.com
http://groups.yahoo.com/group/toolrest/