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[Letter from Chicago Concrete Breaking Co. to Alex Bradford - November 8, 1939]

Description: Letter from the Chicago Concrete Breaking Company to Alex Bradford discussing the efficacy of hydraulic cartridges within the field demolition. The results of the Chicago Concrete Breaking Co. was that hydraulic cartridges were simply too slow and ineffective when compared to pneumatic pavement breakers in locations where explosives were not plausible.
Date: November 8, 1939
Creator: Chicago Concrete Breaking Co.
Partner: Private Collection of Mike Cochran

[Buildings in downtown Chicago]

Description: Photograph of the tops of some buildings in downtown Chicago. In the foreground is a tall domed building with bird statues near the top. Steam and smoke can be seen streaming out of some of the buildings nearby.
Date: [1939..1989]
Creator: Clark, Joe
Partner: UNT Libraries Special Collections
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