An elementary course of geology, mineralogy, and physical geography. /

by Ansted, D. T. 1814-1880.
Imprint 1850

Orr's Circle of the sciences: a series of treatises on the principles of science, with their application to practical pursuits. vol. IV. Inorganic nature.

by Orr, William Somerville, -1873.
Imprint 1859