University of Illinois Urbana-Champaign

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Showing 331–360 of 2,455 items
Thumbnail for Illinois mineral industry in 1941
Illinois mineral industry in 1941
Voskuil, Walter Henry; Stevens, Douglas F.; Oliver, G.N.

Thumbnail for Fluorspar in Illinois
Fluorspar in Illinois
Bradbury, James C.; Major, Robert L.; Finger, G.C.

Thumbnail for Cache River Area Assessment
Cache River Area Assessment
Illinois Department of Natural Resources. Office of Scientific Research and Analysis

Thumbnail for Oil investigations in Illinois in 1916, under direction of Fred H. Kay.
Oil investigations in Illinois in 1916, under direction of Fred H. Kay.
Illinois State Geological Survey; Kay, Fred Hall; Brokaw, Albert Dudley; St. Clair, Stuart; Butts, Charles

Thumbnail for Use of Illinois coal fines in production of metallurgical coke
Use of Illinois coal fines in production of metallurgical coke
Jackman, Harold Wesley; Helfinstine, Roy John

Thumbnail for Some observations on the blending of coals for metallurgical coke
Some observations on the blending of coals for metallurgical coke
Reed, Frank Hynes; Jackman, Harold Wesley; Rees, O.W.; Henline, P.W.

Thumbnail for Illinois fluorspar
Illinois fluorspar
Finger, G.C.; Risser, H.E.; Bradbury, J.C.

Thumbnail for Availability of the Colchester coal for mining in northern and western Illinois
Availability of the Colchester coal for mining in northern and western Illinois
Korose, Christopher P.; Elrick, Scott D.; Jacobson, R.J.