groundhog kiln (was gopher kiln)

updated sat 25 dec 10

Jeff Longtin on fri 24 dec 10

The puzzle has been solved. (My memory failed me again.) Thanks for the
corrections.

"The Groundhog kiln was popular among potters in the American south."

Makes me wonder what was popular among American potters in the north.
(Bottle kilns?)

Jeff Longtin
Minneapolis