INDEX 



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 Chiri- 



qui 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, 2 

 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, 



44. 4S 



Brown, Horace, F.R.S., his experi- 

 ments with seeds at low 

 temperatures, 175 



Bruce, Sir David, his report of the 

 work done by the Lister In- 

 stitute 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 

 oT 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, 186 

 Cannel (or candle) coal, 219 

 Carbon, weight of, annually dis- 

 charged over London, 218 

 Carboniferous system, the, 221 



