From 1900 through 1940, North Carolina produced 60 percent of all the mica mined in the United States. The Franklin-Sylva District ranked second in total production among the mica mining areas of the Southeastern states and supplied approximately 20 percent of North Carolina's output. This publication is a reflection of the importance of this mineral to North Carolina and the United States. Includes description of 20 selected mines, as well as 6 figures and 19 plates. The Franklin-Sylva District comprises parts of Macon, Haywood, and Transylvania counties. By J.C. Olson and others, 1946.