Constant temperature calorimeter room
John Kuhn is shown determining calorific values of Illinois coals;
1 photograph and negative;
August 19, 1960;
Manuscripts, maps, fieldnotes, and photographs may be viewed in-house only. Please contact the ISGS Special Collections Curator, Anne Huber, for an appointment at 217-300-0005 or email firstname.lastname@example.org Monday thru Friday, 8am-noon or 1pm-5pm.