A Prospectus of the Prall System

First Edition. 8vo, 7 pages; G-; gray cover with black print, slight peripheral tanning, slight smudging, all corners bumped/worn, tears at top, bottom and center of spine, stain to upper edge and right edge, back cover has tear at center of spine edge, slight spotting; interior has slight spotting, center pages detached from binding with right edge stained and slightly chipped; clean text; "For Supplying Heat and Power through Street Mains, by Means of Superheated Water, and of the Company to be organized for the Introduction of the System in the City of Washington"; "Washington, D.C., July 1, 1885."


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