On Wed, 25 Aug 2004 12:03:43 -0500, Richard J Kinch
wrote:

Craig Suslosky writes:

I have a 1960 Bridgeport J head mill I am working on and have a
question. On the right side of the knee (facing the machine) there are
three 3/8-16 tapped holes, which are also spotfaced to accept washers.
What are these holes for? These are not the grease fitting holes, mine
hase nothing there. Just wondering if anyone knows what should be
there.

A DRO scale that has been removed.

WHOA!!! Some DRO to need 3/8 bolts. Maybe you meant optical reader
or Trav-A-dial.