Melville, G. W., cited, [289].

Mercalli, G., cited, [89], [117], [119], [147].

Merrill, George P., cited, [156].

Mesa, [215], [216];

origin of, [112].

Metamorphic rocks, [30], [31], [465].

Meteorites, compared with earth, [22];

composition of, [21], [23].

Mica, [458].

Mica schist, [465].