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Factors Governing the Entry of Solutions into Ores During Leaching
Technical paper issued by the Bureau of Mines over studies on the leaching of copper-bearing ores. As stated in the introduction, the "penetration of the leaching medium into the body of the ore particles" (p. 1) is discussed. This paper includes tables, photographs, and illustrations.
Date:
1929
Creator:
Sullivan, John D.; Keck, Walter E. & Oldright, George L.
Object Type:
Report
System:
The UNT Digital Library
A Frontier Doctor
This autobiographical account of Dr. Henry Franklin Hoyt chronicles his family's history, his upbringing on a small farm in Minnesota, his work as a surgeon in New Mexico, Chicago, California, Texas and the Philippines, along with many other miscellaneous adventures.
Date:
1929
Creator:
Hoyt, Henry Franklin
Object Type:
Book
System:
The Portal to Texas History
Southwestern road map : 1929 official road map (showing roads radiating from El Paso, Texas with mileage between points).
Map shows lesser and major highways, cities and towns, and points of interest for the southwestern states of Texas, New Mexico, Arizona, northern Mexico, and the southern portions of California, Nevada, Utah, and Colorado; distances between cities. Includes legend [key to highways], distance tables, text, and advertisements; in lower right corner: Metcalf, El Paso logo. Scale not given.
Date:
1929
Creator:
El Paso Auto Association
Object Type:
Map
System:
The Portal to Texas History