Lubbock, Sir John, cited, [7].
Luray caverns, Virginia, [186].
Luster, of minerals, [450].
Lyell, Sir Charles, cited, [7], [96], [146], [199], [259], [260], [304].
Maare, [405].
McGee, W. J., cited, [157], [259].
Mackinac Island, records of uplift of, [341-344].
Madison, Wisconsin, [233], [237], [241], [317], [434].
Magellan, circumnavigation of globe, [9].
Magma, defined, [30].