Hi,  There are two glass harmonicas in Carlisle PA.  I have one that
I picked up at a yard sale:  it is homemade but made very well with
31 goblets, all tuned nicely (how the builder  did that I can't say).
All mounted on a low rectangular box with a sound hole in the top.

The other is a very nice one in the Cumberland County Historical
Society museum.  It is very similar to the one at the Corning museum
that was mentioned previously.

Best, Mike Kitner