Photograph as originally submitted to this page in the Historical Marker Database www.HMdb.org. Click on photo to resize in browser. Scroll down to see metadata.
Discovery of Portland Cement Marker
Photographer: Don Morfe
Taken: July 5, 2015
Caption: Discovery of Portland Cement Marker
Submitted: July 14, 2015, by Don Morfe of Baltimore, Maryland.
Database Locator Identification Number: p315402
File Size: 1.866 Megabytes

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