Photograph as originally submitted to this page in the Historical Marker Database Click on photo to resize in browser. Scroll down to see metadata.
Progressive Experiment Marker
Photographer: David Seibert
Taken: April 25, 2013
Caption: Progressive Experiment Marker
Submitted: November 7, 2017, by David Seibert of Sandy Springs, Georgia.
Database Locator Identification Number: p402900
File Size: 1.487 Megabytes

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