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Date: 1915 

Description: Certificate issued to E.M. Griffith, the Wisconsin State Forester, so that Griffith could prove that he had flown at an altitude of 1600 feet in the "flyin...

Date:  

Description: Letterhead of the Dayton Pump Products Company of Belgium, Wisconsin, distributor of Dayton Water Systems, with six vignettes of water systems in use: wate...

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