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A map of the internal provinces of New Spain: the outlines are from the sketches of, but corrected and improved by Captain Zebulon M. Pike, who was conducted through that country, in the year 1807 by order of the Commandant General of those provinces.

Description: Map shows the "boundary between the Vice Royalty and the Internal Provinces which are independent of the Vice Roy"; villages, roads, areas of Native American habitation, mining activity, and physical features for the northern provinces of New Spain; the Rio Colorado and the Rio del Norte [Rio Grande]. Includes notes and references. Relief shown pictorially. Scale [ca. 1:4,827,000].
Date: 1895
Creator: Pike, Zebulon Montgomery, 1779-1813
Partner: University of Texas at Arlington Library

Process of Treating Slag and Furnace Therefor.

Description: Patent for a process of treating slag and furnace therefore. It has an improved method for separates melted metals produced during smelting and extracting the precious metals from slag. The richer matte and base-bullion run off separately and into separate taps.
Date: August 20, 1895
Creator: van Cleve, Charles M. & Rhodes, Robert D.
Partner: UNT Libraries Government Documents Department
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