Resource Type

Ocher and Ochery Earths (open access)

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
Annual Report of the Boy Scouts of America: 1927 (open access)

Annual Report of the Boy Scouts of America: 1927

Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1927, activities, ideals, organizational leadership, and other information about scouting programs.
Date: May 22, 1928
Creator: Boy Scouts of America
System: The Portal to Texas History
Report of the Twenty-First National Conference on Weights and Measures, 1928 (open access)

Report of the Twenty-First National Conference on Weights and Measures, 1928

Report of the annual conference on weights and measures, hosted by the U.S. National Bureau of Standards in Washington D.C. It includes conference proceedings, a list of attendees, information about committees and officers, and other reports or commentaries discussed at the meetings.
Date: May 1928
Creator: United States. National Bureau of Standards.
System: The UNT Digital Library
Endurance Tests of Tires (open access)

Endurance Tests of Tires

Technical paper issued by the Bureau of Standards over studies conducted on the endurance of tires. 230 tires of 36 different brands were tested during the studies. The results of the studies are presented and discussed. This paper includes tables, and photographs.
Date: May 25, 1926
Creator: Holt, W. L. & Wormeley, P. L.
System: The UNT Digital Library
Annual Report of the Boy Scouts of America: 1923 (open access)

Annual Report of the Boy Scouts of America: 1923

Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1923, activities, finance, foreign relations, organizational leadership, and other information about scouting programs.
Date: May 2, 1924
Creator: Boy Scouts of America
System: The Portal to Texas History
Leaching Nonsulphide Copper Ores with Sulphur Dioxide (open access)

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 (open access)

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