Gregory, J. W., cited, [11], [19], [439], [446].

Grooved upland, [372], [373].

Gross, H., cited, [294].

Grossman, cited, [268].

Grottoes, sea, colors of, [258].

Ground water, [180];

descent of, in relation to joints, [181].

Ground water lakes, [424].

Grund, A., cited, [195].

Gullies, early stages of, [160].