Single-pan balance with an accuracy of one two hundred fifty millionth of an ounce, used for microchemical analysis
September 19, 1960;
D.R. Dickerson in the laboratory;
2 photographs and negatives;
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 email@example.com Monday thru Friday, 8am-noon or 1pm-5pm.