Chamberlin and Salisbury, the Laramide range, 121.
Clarke, F. W., estimate of mass of sediments, 9; age of Earth by
sodium collection, 14; average composition of sedimentary and
igneous rocks, 42; on average composition of the crust, 126;
solvent denudation of the continents, 17, 40.
Claus, protoplasm the test of the cell, 67; abortion of useless
organs, 69.
Coefficient of friction, definition of, 262; deduction of, from
angle of friction, 263; abnormal values on ice, 261-265, 282; for
various substances, 265.
Continental areas, movements of, 144.
Cornil and Babes, size of spores, 98.
Croll, James, dawn of evolution, 301.
Crust of the Earth, average composition of, 126; depth of
softening in, 128.
Curie, definition of the, 256.
D.