  - Ages, successive, of stone, bronze, and iron, 4
- Aitken, Dr., F.R.S., on fog, cloud, and odoriferous particles, 77
- Alligator, simplification of, in the decorative work of the Chiriqui Indians, 205
- Altamira, cave of, discovery of pictures in, 28
- America (Central), stone slab from, with carved swastika, 198
- American Indians bead-work garter with two swastikas, 197
- Anglo-Saxon urn ornamented with swastikas, 196
- Aniline, 224
- Animalcules, wheel, 157-172
- Animation, suspended, 173-190
- Anthracite, 217, 219
- Anti-scorbutic value of germinating wheat, barley, peas, beans, lentils, discovered, 237
- Anti-scorbutics, no use when dried, 230
- or preservatives against scurvy described, 235-236 studied at the Lister Institute, 233
- Antler, engraved, from the cavern of Lortet, 1
- Arbelus, the, of ancient Greek geometers, 215
- Asphalt, 223, 225
- Aurignacian negroid race, 8
- Bacteria, suspended animation of, 177, 186, 187, 188
- Bear engraved on stalagmite, 48
- Beer, modern, not so effective an anti-scorbutic (preserver from scurvy) as older sorts, 237
- Benzine, 224
- Bison, pictures of, from walls of caves, 47
- Bitumen, 223, 224
- Bituminous coal, 219
- Blue blood and pride of race, 154
- colour of frogs, 78
- of the Lake of Geneva, 83
- of water, 74-85
- Grotto of Capri, 82
- Breeding and inter-breeding as a test, 102, 104, 131
- Bridle seen in engravings of horse, 43, 45
- Brown, Horace, F.R.S., his experiments with seeds at low temperatures, 175
- Bruce, Sir David, his report of the work done by the Lister Institute in 1919, 233
- Buddha, footprint of the, picture showing swastikas, 193
- Bumpus, Prof., on variation in sparrows, 118
- Burnett, Sir William, by mistake introduces in the Navy juice of the
- sour-lime in place of lemon-juice, 236
- Burning water, fountains of, 225
- Butterflies of the genus Vanessa, 97
- several different species of white and of blue, 97
- several species united to form one larger kind–a genus, 95
- species of, 94
- the kinds of, 94
- Caloric, an assumed entity, 164
- Petroleum, the name invented in 1855 by Prof. Silliman, 225
- Pictet and de Candolle on suspended animation, 175
- Picture, the earliest, in the world, 1-25
- of the Three Red Deer, 12, 13
- Piette, Edouard, his excavations of caves, 1
- Pigs and the paint-root, 119, 145
- Pimpernel, red and blue, will not inter-breed, 145
- Pine ornament of Indian shawls, 210
- Pleistocene, a small fraction of earth's crust, 42
- series or system, 38, 39
- Pliny the elder at Vesuvius, 58
- Pocahontes, the Algonkian princess, 153
- Prehistoric men, art of, 35-54
- successive ages of, 36-39
- Printings from engraved cylinders, 11, 16, 17
- Race, pride of, 150, 152, 153
- Racehorse, English thoroughbred, history of, 147
- Races, nature of, 143
- produce mongrels by cross-breeding, 140
- Reindeer, cave-man's engraving of, 46
- period, 7
- Restoration of the Lortet picture of the Three Deer, 13
- Rhinoceros drawn on wall of a cavern, 46
- Rice, polished, the story of, and the disease beri-beri, 234
- Rock-oil, 225
- Romanes, Dr. George, his experiments on the suspended animation of seeds, 184
- Rotifer, the common, or wheel animalcule, 159
- Scandinavian silver work showing swastikas, 196
- Schliemann, fragment of pottery found by, in Tiryns, 23
- swastikas discovered by, at Hissarlik, 193
- Scurvy, description of, 229
- Seeds, frozen, survive, 177
- Simplification of decorative designs (figures of), 206
- Smoke nuisance, London citizen executed for producing it in 1306, 217
- Sparrows, variations in, 118
- Species, an attempt to estimate their number, 129
- in the making, 108
- Latin names for, why used, 96
- not a convention, but a naturally limited group of individuals, 100
- not the same as a variety or a race, 101
- of common English plants, 98
- of crayfish, 120
- types or type-specimens of, 96
- what the word means, 91-99
- Specific characters, 118-130
- Spencer, Herbert, on life, PRINTED BY
MORRISON AND GIBB LTD.
EDINBURGH Transcriber's Note: - Minor typographical errors have been corrected without note.
- Ambiguous hyphens at the ends of lines were retained.
- Mid-paragraph illustrations have been moved between paragraphs and some illustrations have been moved closer to the text that references them. The paginations in the list of illustrations and Index have been adjusted accordingly.
- Footnotes were moved to the end of chapters and numbered in one continuous sequence
- Other corrections:
- p. 72: SuffriÈre changed to SoufriÈre (SoufriÈre of St. Vincent in 1812).
- pp. 153, 242: Pocahontes changed to Pocahontas.
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