Shoals, atmospheric indications of their vicinity, 309.
Sidereal systems, 89, 90.
Siljerstrom, his observations on the Aurora, with Lottin and Bravais, on the
coast of Lapland, 195.
Sirowatskoi, "Wood Hills" in New Siberia, 281.
Snow-line of the Himalayas, 30-33, 331, 334; of the Andes, 330; redness of
long-fallen snow, 344.
Solar system, general description, 90-154; its position in space, 89; its
transistory motion, 145-150.
Solinus on mud volcanoes, 225.
Sommering on the fossil remains of the large vertebrata, 274.
Somerville, Mrs., on the volume of fire-balls and shooting stars, 116;
faintness of light of planetary nebulae, 141.
Southern celestial hemisphere, its picturesque beauty, 85, 86.
Spontaneous generation, 345, 346.
Springs, hot and cold, 219-225; intermittent, 219; causes of their
temperature, 220-222; thermal, 222, 345; deepest Artesian wells the warmest,
observed by Arago, 223; salses, 224-226; influence of earthquake shocks on
hot springs, 210, 222-224.
Stars, general account of, 85-90; fixed 89, 90, 104; double and multiple,
89, 147; nebulous, 85, 86, 151, 152; their translatory motion, 147-150;
parallaxes and distances, 147-149; computations of Bessel and Herschel on
their diameter and volume, 148; immense number in the Milky Way, 150, 151;
star dust, 85; star gaugings, 150; starless spaces, 150, 152; telescopic
stars, 152; velocity of the propagation of light of, 153, 154; apparition of
new stars, 153.
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