Featured MAGIC LANTERN SLIDES Hoping to understand them more TIA

Hi all! We just received 3 boxes of approximately 45 slides each. I’m trying to understand what we have.

Box end of one looks like this


Three examples of the enclosed 3-1/4” x 4” glass slides are below.


1) Is there anyway I can tell contents by the labeling on the side?

2) Why do some have what appears to be a bullseye on the slide? Some have circles, etc, over the photograph. Why?

Anything else you can tell me to help find a proper home for them? Many thanks and kindest regards,
Sally-Studio Antiques

 

If you read through this Wiki article about the company, you'll see in the section entitled Stereoscophthalmic Department that they made slides for eye testing and eye-training for a number of uses starting in the 30's. Given the strange bulls eyes and circles, I'd say this is a good guess for what these are.

https://en.wikipedia.org/wiki/Keystone_View_Company

 

"Unit Title" would lead one to believe that the box was intended to hold slides designed to support a school lesson and the 2/color illustrated slides do, in fact, look like they could be used for a lesson on American Indians. What type of images are on some of the other slides?

Debora

 

@Bakersgma , thanks. They are so interesting and I’m afraid to sell them without knowing more. I’ll take a look at the wiki entry

 

Hum... Well, some clearly belong to a "ring series," whatever that is. But does appear to be a mixed lot.

Debora

 

Here are some sites you can contact for help, the UK group (1st one linked) responded quickly and were a great help when I had a bunch of slides
http://www.magiclantern.org.uk
http://www.magiclanternsociety.org/about-magic-lanterns/lantern-types/

this is a site you can try and use for searching your slides
https://www.slides.uni-trier.de/contact.php

 

@cxgirl THANKS!