Letters on geology: being a series of communications originally addressed to Dr. John Locke, of Cincinnati, giving an outline of the geology of the West and South West, together with an essay on the erratic rocks of North America, addressed to M. de Verneuil. Illustrated by geological sections and engravings of some rare fossils. - Christy, David, 1802- (Rossville [O.] J.M. Christy, printer, 1848)
Imprint on cover: Oxford, W. Wallace; J.M. Christy, printer, Rossville.
Text on p. [4] of cover.
Keywords: Geology -- United States