In a message dated 9/17/2000 10:57:49 AM Eastern Daylight Time,
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<< We've heard all about arastras used to break ore-bearing rocks, but what
about the clay and soil grinding machines that look just like arastras? I
don;t recall what they were called, bu I've seen them in various sizes from
portable to horse powered with 5 foot stones used in preparing materials
for brick, adobe, and pottery. Brick bats and pottery wasters could also
be ground in them and mixed with the clay.
Dan W. >>
Are you referring to pug mills perhaps?
Carl Steen