Engineering, 11; projects covering large areas, 12, opp. 22 (ill. and map) Erie, Lake, 72, 73 (ill. and map) Erosion, headward, 57, 65 (ill.), 68 (ill.) Everglades, 27 Exploration, 71 Exposure, 102 Eye versus camera, 5, 101 Far Rockaway, Long Island, 100 (ill.) Filters, 102 Fishing Bay, Virginia, 46 (ill.), 47 (map) Flats. _See_ Mud flats Flood plain, 33 (ill.) Florida coast, channels and shoals near Miami, 96 (ill.), 97 (ill.), 102; coral heads and pinnacle rocks, 93 Flowerfield, Mich., 52 (ill.), 53 (map) Forests, 23 Gardens, 12 Genesee River, opp. 74 (ill. and map) Geologic maps, 69 Geology, 69 Glacial drift plain, 52 (ill.) 55 Glaciers, 57; glacial gorge, Mt. Shasta, 59 (ill.); Mt. Shasta, 58 (ill.) Gloucester Point, Va., 77, 83 Goddard, G. W., 72 Gorges, 57, 61; Genesee River, opp. 74. (ill. and map); glacial gorge on Mt. Shasta, 59 (ill.); San Joaquin Hills, California, 68 (ill.); Yosemite Valley, 60 (ill.) Grand Trunk Railway, near Schoolcraft, Mich., 56 (ill.) Great Plains, 50; river channel--Red River, 51 (ill.) Gwynn Island, Virginia, 46 (ill.), 47 (map) Half Dome, 60 (ill.) Hampton, Va., small stream near, 33 (ill.) Headward erosion, 57, 65 (ill.), 68 (ill.) Hell Gate Bridge, 11, 15 (ill.) Hereford Inlet, New Jersey, 98 (ill.) Hill Marsh, Virginia, 34 (ill.), 35 (map), 38 Hooks. _See under_ Spits Hotlum Glacier, Mt. Shasta, 58 (ill.), 59 Hudson River and West Point, 8 (ill.) Ice cap, 57 Inclinometer, 2, 3 (ill.) Index map showing areas photographed, 75 Inlets, formation through barrier beach, 81 (ill.); Hereford Inlet, New Jersey, 98 (ill.); River, New Jersey, 82 (ill.); tidal--Beach Haven, N. J., 85 (ill.) Introduction, ix Iroquois, Lake, opp. 74 Islands, tied, 77 (ill.); at Napatree Point, Rhode Island, 92 (ill.) Ives, H. E., 6, 79 James River and Mulberry Island, 24 (ill.), 25 (map) Jones, E. Lester, 74, 88 Jones, John Paul, 7; mausoleum, 9 (ill.) Kenilworth, D. C., 13 Kettleholes, 52 (ill.), 53 (map), 55, 56 (ill.) Kilmarnock, Va., topographic sheet, 47 Lambs Creek, Virginia, 48 (ill.) Land forms, submerged, 45 Landscape gardeners, 1, 11 Landscape gardening, 11, 12 (ill.), 13 (ill.); Long Branch, N. J., 18 (ill.) Langley, S. P., ix Langley Field, xi Lassen Peak, 57, 62 (ill.), 63 (map) Lassen Peak, Cal., topographic sheet, 63 Lava, 62 Lee, Robert E., statue, 12 (ill.) Lee Marsh, Virginia, 36 (ill.); details, 30 (ill.) Library of Congress, 7 Little Egg Harbor, New Jersey, 81, 85 Little Egg Inlet, New Jersey, 86 (ill.), 87, 91 (ill.) Little Hell Gate, 15 (ill.) Long Beach, Long Island, 100 (ill.) Long Beach, New Jersey, 84 (ill.), 85 Long Branch, N. J., part, showing barrier beach development, 18 (ill.) Long Island, East Rockaway Inlet, 100 (ill.); Far Rockaway bars, channels, beaches, and marsh, 100 (ill.); Rockaway Beach, 11, 17 (ill.); Hell Gate Bridge to, 15 (ill.)