Phyteral and maceral
revision of 1943 edition;
Discusses concept of coal as a rock and "macerals" as analogous to minerals, and rejects it because coal is an agglomeration of plant entities which can be identified in thin-section.;
Cited in Circular 201, "Unpublished Reports on Open File";
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.