Serial/Series Title
Country
4 Matching Results
Results open in a new window/tab.
Results:
1 - 4 of
4
Ocher and Ochery Earths
Report about ocher or ochery earth, "a natural mineral pigment composed largely of clay permeated with hydrated iron (ferric oxide)" (p. 2). It includes information about the uses of choer, substitutes, artificial ocher, mining and local deposits, import and export of ocher, and related information.
Date:
May 1929
Creator:
Santmyers, R. M.
System:
The UNT Digital Library
The Electrothermic Metallurgy of Zinc
Report issued by the Bureau of Mines over the electrothermic metallurgy and smelting of zinc. Different smelting methods, processes, and equipment are presented and discussed. This report includes tables, illustrations, and photographs.
Date:
May 1923
Creator:
O'Harra, B. Marvel
System:
The UNT Digital Library
Leaching Nonsulphide Copper Ores with Sulphur Dioxide
Report issued by the Bureau of Mines discussing the sulfurous acid leaching of the Southwest experiment station. Operations and analyses of the experiment station are presented. This report includes tables, illustrations, and photographs.
Date:
May 1923
Creator:
Van Barneveld, Charles E. & Leaver, Edmund S.
System:
The UNT Digital Library
Safe Mechanical Equipment for Use in Shaft Sinking
Technical paper issued by the Bureau of Mines over shaft sinking safety. Safe mechanical equipment and procedures are discussed. This paper includes illustrations.
Date:
May 1922
Creator:
Kudlich, R. H.
System:
The UNT Digital Library