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Gases from Blasting in Tunnels and Metal-Mine Drifts
From Introduction: "This paper gives the results of sampling the gases from blasting drift rounds at five mines-the United Verde Extension, Calumet & Arizona, Old Dominion, Mountain Copper, and the United Verde-and of tunnel rounds at the Big Creek water tunnel and Moffat railroad tunnel. The paper also describes the rounds blasted and the methods of sampling and analyzing the gases. In all, 99 rounds were fired and 376 samples were taken."
Date:
1927
Creator:
Gardner, E. D.; Howell, S. P. & Jones, G. W.
System:
The UNT Digital Library
Drilling and Blasting in Open-Cut Copper Mines
From Introduction: "The drilling and blasting practices described in this bulletin are chiefly those in use at the time of these visits. Information, obtained by correspondence, on recent changes at certain mines is also included. The bulletin is confined to descriptions and comparisons of drilling and blasting methods at the six open-cut mines."
Date:
1927
Creator:
Gardner, E. D.
System:
The UNT Digital Library
Technology and Uses of Silica and Sand
Report discussing the technology for mining silica and the various uses of silica in industry and the arts.
Date:
1927
Creator:
Weigel, W. M.
System:
The UNT Digital Library
Technology and Uses of Silica and Sand
Report issued by the Bureau of Mines over studies conducted on the production and uses of silica. Forms and different uses for silica are discussed. This report includes tables, illustrations, and photographs.
Date:
1927
Creator:
Weigel, W. M.
System:
The UNT Digital Library
Coal-Mine Fatalities in the United States, 1926
Report compiled by the U.S. Bureau of Mines including statistics on fatalities in coal mines located in the United States as well as data regarding the various operations (e.g., number of miners employed and average production). The information is organized into tables for comparison and the text draws some overall conclusions in the summary.
Date:
1927
Creator:
Adams, William W.
System:
The UNT Digital Library
Annual Report for the National Advisory Committee for Aeronautics (12th). Administrative Report Including Technical Reports Nos. 233 to 256
Report includes the National Advisory Committee for Aeronautics letter of submittal to the president, congressional report, summaries of the committee's activities and research accomplished, bibliographies, and financial report.
Date:
1927
Creator:
unknown
System:
The UNT Digital Library
Annual Report of the Boy Scouts of America: 1926
Annual report submitted by the Boy Scouts of America to Congress describing highlights from 1926, activities, ideals, finance, organizational leadership, and other information about scouting programs.
Date:
April 1, 1927
Creator:
Boy Scouts of America
System:
The Portal to Texas History
Placer-Mining Methods and Costs in Alaska
From Scope of Bulletin: "This bulletin gives the results of a study of present conditions in Alaska placer mining, including the methods employed and the costs, and will be helpful to placer miners, engineers, and all others interested in the industry."
Date:
1927
Creator:
Wimmler, Norman L.
System:
The UNT Digital Library