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Sectional map indicating main automobile roads between Canada and United States (middle west sheet).
Map of roadways in the Midwestern United States and southern portions of the Saskatchewan, Manitoba, and Ontario provinces of Canada. The map includes major towns, bodies of water, and boundaries. The map also includes an inset map of the four Canadian road map sheets in this series near the upper-right corner. Scale [ca. 1:2,217,600] (35 miles to the inch).
Date:
1931
Creator:
Canada. National Development Bureau.
Object Type:
Map
System:
The Portal to Texas History
Microscopic Structure and Concentratability of the Important Iron Ores of the United States
Outline of Problem: "This paper covers a survey of 19 ores collected from seven of the more important iron-ore districts of the United States and is a contribution by the ore-dressing section of the United States Bureau of Mines to general research program on iron and steel being conducted by the Bureau."
Date:
1936
Creator:
Cooke, S. R. B.
Object Type:
Report
System:
The UNT Digital Library