, ii. 115.

Soul, Indian ideas of the, i. 60.
Purification of, i. 61.
Diogenes' opinion of that of the world, i. 99.
Plato's doctrine of the triple constitution of, i. 156.
Greek problem as to the nature of, i. 218.
As to the immortality and absorption of, i. 228.
The human, ii. 365.

Sound, nature and properties of, ii. 369.

Spain, Roman annexation of, i. 247.
Arab invasion of, ii. 28.
Literature of, ii. 35.
Crime of, ii. 166.

Sparta, Lycurgus abolished private property in, i. 129.

Spartacus, the gladiator, i. 248.

Species, Cuvier's doctrine of the permanence of, ii. 326.
Opposition to the doctrine of transmutation of, ii. 328.

Specific gravity, Alhazen's tables of, clearly approach our own, ii. 48.

Sphaerus, the Stoic, fraud practised on, i. 189.

Spheres, music of, a belief entertained by the Pythagoreans, i. 116.

Sphinxes, one of the wonders of ancient Egypt, i. 76.

Spinal cord, its separate and conjoint action, ii. 352.

Spires, first Diet of, ii. 210.

Spirit, in chemistry, had at first a literal meaning, i. 405.

Spiritualists, their devout regard for the "Everlasting Gospel," ii. 78.

Spontaneous generation, Anaximander's doctrine of, i. 107.
Anaxagoras's doctrine of, i. 109.

Stage, state of, an index of the mental condition of a nation, ii. 249.

Stancari first counted the vibrations of a string emitting
musical notes, ii. 390.

Stars, multiple, i. 4.
Coloured light of double, ii. 277.
Our cluster of, how divided, ii. 280.

Star-worship, fetichism displaced by, i. 3.
The philosophy of, i. 90.

Steam-engine first invented by Hero, i. 205, 387.
The nature of Watt's improvement in, ii. 385.

Steno first recognizes the twofold division of rocks, ii. 315.

Stephania, wife of Crescentius, poisons Otho III., ii. 7.

Stephanus, a grammarian of Constantinople, ii. 58.

Stephen II., Pope, consecrates Pepin and his family, i. 370.

Stephen III., Pope, urges Charlemagne against the Lombards, i. 371.

Stephenson, George, his improvement in the locomotive, and its
results, ii. 387.

Stercorists, their doctrines, ii. 10.

Stereoscope, an optical instrument, ii. 380.

Stevinus, his mechanical works, ii. 269.
Revives correct views of the mechanical properties of water, ii. 372.

Stigmata, marks miraculously impressed on the body of St.
Fr