matrix

Were they using Braille?

It's a Stereograph, and it's got "The N.Y. Inst. For The Blind" written on the front right.
It's a machine for embossing zinc plates with Braille, to use as publishing masters and is described in the Institution's 1899 annual report. The description is for use of basically the same machine pictured above, except it is operated with a foot treadle instead of an electric motor:


A letter from the school superintendent to his boss is also in the report:
"We have thoroughly tested the value of the Stereograph and find it to be of so much practical value in our school work that we do not now see how we could do without it The Stereograph has practically put our students on a footing with the sighted It saves valuable time to both teacher and pupil The Stereograph is a perfect machine It will do all you claim for it and more In giving us this machine you have wonderfully facilitated our work."
books.google.com/books?id=f1HKAAAAMAAJ&lpg=PA51&o...

Thanks for the info. That letter sounds like it might have been a paid endorsement. We lived in a town with a school for the blind for years so this is of particular interest.

artolog: Thanks so much for the illustration and explanation (and for pointing us to the source!). We can add some information to the description when we next update.

See notes under

artolog: Thanks for the helpful information. We can add to the description when we next update it.