Mystery Illustration 59



The purpose?

Answer here.

And after the jump.
Posted By: Paul - Sun Oct 08, 2017
Category: Technology, 1910s





Comments
An exterminator listening for bugs in the wall, I thought.
Posted by Virtual in Carnate on 10/08/17 at 10:20 AM
Micro-megaphone? Sounds like one of George Carlin's self-cancelling phrases, like "jumbo shrimp."
Posted by KDP in Madill, OK on 10/10/17 at 09:07 AM