Hoyt metal is a two-ply metal "laminate" used in the manufacture of
pipe organs.  It is basically a tin coating over a substrate of an
inexpensive grade of pipe metal (lead, antimony, and tin).  Builders
use it to get a better appearance than could be had with the
inexpensive pipe metal alone.

Dave Vincent

 [ Dave, this definition is considerably different from the pre-WW1
 [ meaning cited by Hal Davis.  Is this type of Hoyt metal defined by
 [ a published industry standard?  It may simply be jargon indicating
 [ tin-plating.   -- Robbie