[78-L] Edison Tone Tests: Stage layout

[Ron Roscoe]

Folks;
I have a strong memory of seeing a diagram of the official stage layout required by the Edison company for their Tone Tests.
It showed the Diamond Disc machine placement, the exact number and placement of rugs and furniture, the placement of the piano, the lamps, etc, etc.  But, darned if I can find it again!  I'm pretty sure it was on the internet, but, search as I may, I can't find it!

Can anyone help?

Thanks,
Ron Roscoe