Search U.S. government technical reports digitized or harvested by TRAIL.
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