A Prospectus of the Prall System

First Edition. Softcover. 8vo, 7 pages; G-; gray cover with black print, peripheral tanning slight smudging, all corners bumped with small tears, tears at top and bottom of spine, vertical center crease throughout, back cover has pencil notation near bottom edge, slight spotting; interior has slight spotting, small stain to upper right corner of first page, slight tear to lower right page corners; 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." 1293198. Rockville Non-Retail Listings. (Inventory #: 1293198)