Search U.S. government technical reports digitized or harvested by TRAIL.
Mining and treatment of lead and zinc ores in the Joplin district, Missouri :a preliminary report
Answers to questions on the flotation of ores
Feldspar mining and milling :near Keene, New Hampshire
Milling methods in the tri-state zinc district
Accidents at metallurgical works in the United States :during the calendar year 1921
Accidents at metallurgical works in the United States :during the calendar year 1922
Accidents at metallurgical works in the United States :during the calendar year 1923
Accidents at metallurgical works in the United States :during the calendar year 1924
Accidents at metallurgical works in the United States :during the calendar year 1925
Preliminary ore dressing tests to recover manganese in rhodochrosite ores.
Accidents at metallurgical works :during the calendar year 1926
Centrifugal concentration :its theory, mechanical development and experimental results
Accidents at metallurgical works in the United States :during the calendar year 1927
Classification and tabling of difficult ores :with particular attention to fluorspar
Roasting of lead-carbonate ores preliminary to gravity concentration
Re-treatment of mother lode (California) carbonaceous slime tailings
Accidents at metallurgical works in the United States :during the calendar year 1928
Re-treatment of mother lode carbonaceous slime tails
Concentration tests on tailings from the washing plants on the Mesabi Range, Minnesota
Accidents at metallurgical works in the United States :during the calendar year 1929
Milling methods and costs at the lead concentrator of the Hecla Mining Co., Gem, Idaho
Accidents at metallurgical works in the United States :during the calendar year 1930
Accidents at metallurgical works in the United States :during the calendar year 1931
Accidents at metallurgical works in the United States during the calendar year 1932
Progress report - metallurgical division.
Summary of ore-mining cost data
The flotation of Alabama graphite ores
Lead and zinc mining and milling in the United States :current practices and costs
Concentration of the potash ores of Carlsbad, New Mexico, by ore dressing methods
Progress reports - metallurgical division.
Progress reports - metallurgical division.
Progress reports - metallurgical division.
Beneficiation of spodumene by decrepitation
Ball-mill grindability indexes of some American coals
Progress reports - metallurgical division.
Primary crushing :progress report no. 1
Primary crushing :progress report no. 2
Progress reports - metallurgical division.
Primary crushing :progress report no. 3
Mining and milling methods and costs at the Tennessee-Schuylkill Corporation mine, Chloride, Ariz.