Ed Minch wrote:
> I have posted this before but this is about the coolest tool I have. It is
not a sharpening stone - it is a sharpening rock.
I LOVE irregular sharpening stones. That's beautiful.
> The recess has a piece of something like pasteboard at the bottom, saturated
in oil. The lid shows the
> lead screw holes where the waste was removed with an auger - did augers have
lips and lead screws in 1817?
I (very) strongly suspect (given the period, and diameter of the holes) that
those are the traces
of a centre bit. Cheap to make using hand methods, and very effective.