[GreenKeys] What is going on here?

[Jim Haynes]

On Sat, 16 Jul 2022, Sheldon Daitch via GreenKeys wrote:

> 
> This appears to be the same equipment:
> 
Yes, and I recognize those machines as having been made by Alden.
Alden packaged his fax gear in those modular units that you see
in the table.

Alden had a wet paper that turned sepia colored instead of black
with passage of current through it.  And he made all kinds of questionable
statements about the sepia being easier to read, or safer to be around,
etc.  Hogan had the gray or black toned wet paper.  And Western Union
had their own Teledeltos which was a dry paper but thought to emit
toxic fumes when being written.