Handwritten Directions Enclosed with the Glass Slides used with the Projector
Entry/Object ID
2007.0025.0005
Description
Handwritten directions enclosed with the glass slides used with the projector, manufactured by Keystone View Co. located in Meadville Pa.. Later bought out by Bausch and Lomb. Model number 103673. It was used to determin levels of color blindness in school students. Presented to the museum by the Waupun School District on June 13, 2007. At this time there's not date of manufacture or name of inventor.
