alley, 101.
San Jose scale, 109, 151, 153.
Santa Catalina Island, fish preserve about, 169.
Sea lions, 194.
Sea otter, destruction of, 22, 165;
protection of, by law, 179.
Seals, fur, 22;
hunting of, 165.
Sequoias, 99, 115.
Shad, decrease in numbers of, 169.
Sheep, damage done to forests by, 111.
Shingle makers, waste of trees by, 115.
Shore birds, value of, 200.
Sierra Nevadas, "big trees" on, 49;
changes in climate in ascent of, 101, 103;
usefulness of woodpeckers in, 199.
Silt, 75.
Skunks, friends and enemies of, 193.
Soda in soil, 59.
Soil, care of the, 11-12;
effect of destruction of forests upon, 37-38, 40-42;
renewal of, by nature, 45;
story of formation of, 51-56;
real wealth of world formed by, 56;
things of which made, 57-60;
plant food in, 60;
how made, 61-66;
how vegetation holds, 67-72;
our most valuable possession, 74;
evil effects upon, of no protecting carpet of vegetation, 74-80;
effect of, on growth of trees, 101.
Songbirds, hunting of, for their plumage, 185.
Southern states, destruction of soil in, 77;
turpentine from pine forests of, 93.
Spain, waste of resources of, 25-