Sierra Nevada Mountains, Muir on how the snowflakes helped carve them, [37]
Silica, its use by Mother Nature in making sandstone, grass, wheat, and corn, [99]
Slate, and the Fairyland of Change, [98];
its place in the rock mills of the sea, [227];
ancient autographs found in slate, [245]
Sodom and Gomorrah, the Bible story of their destruction and what Science has to say about it, [208]
Soil, how it was made in the beginning of things, [11];
how the Old Men of the Mountain carried New England's best farms away, [31];
how river pebbles act as bankers for the farmers, [80];
how the sea helps make good farming land, [222];
Nature's art work and the making of soil, [229]
Solar system, how it was discovered that there are worlds of worlds, [4];
Laplace's theory as to the origin of the Solar system, [4];
the planetessimal theory, [6]
Soldanella, the flower of the Alps that blooms its way up through the ice, [45]
Special Creation theory, [265]
Spiders, the tarantula and the tarantula killer, [181];
the spiders of the Arizona desert, [182];
how the trap-door spider slams the door in the centipede's face, [182]
Spontaneous variation, the scientific modification of the old "Special Creation" theory, [274]