203.
Deltas of rivers, 43, 55;
alluvial soil in, 64.
Desert, results of lack of vegetation in the, 70-71.
Digger pines, 99.
Ducks, complaints of oyster farmers against, disproved, 194.

Egrets, killing of, 185, 187.
Electricity, harnessing of, 8;
use of water for making, 88.
Elephant, urgent need of protection of, 181.
Elk, 21;
hunting of, 179;
feeding grounds of, 204.
English sparrow, 153;
should be driven out, 188.
Erie Canal, 87.
Eskimos, the, 25;
wood lacking among, 89.

Farmers, great value of work of, 51.
Feldspar, rock grains called, 63.
Fertilizers, 11;
use of herring for, 167.
Field mice, plagues of, 151.
Fire, ignorance of early people concerning, 3;
discovery of, 3.
_See_ Forest fires.
Fish, caring for, 14;
protection needed by, 162-165.
Fish preserves, 169-170.
Fish traps, 22, 165-169.
Flamingos, killing of, 187.
Flowers, destruction of, 144-149.
Fool's gold, 63.
Forest fires, 110-111, 119-124;
steps taken by national government to prevent, 131-138.
Forest rangers, work of,