Bangia fuscopurpurea, structure and reproduction of, i. 223 Barium, i. 3 one of an isomeric triad with calcium and strontium, i. 105 spectrum analysis of the rarefied vapour of, i. 142 effect of high temperature, i. 143 chloride of, spectrum of, i. 146 Bark of trees, structure of, i. 406, 407 Baryta, green coloured light obtained by the combustion of, i. 133 Batarrea, structure of, i. 267 Batrachospermeæ, habitat and structure of, i. 210 Bean, common, fungus of the, i. 280 Beans, caseine obtained from, i. 125 Beer, yeast of, i. 287 Beetles, fungi in the stomachs of, i. 274 Begonia, structure and mode of reproduction, of, i. 376 Bengal, Bay of, causes of the scarlet colour of the, ii. 72 Benzol, combination forming, i. 118, 127 constituents and characteristics of, i. 121 chemical composition of, i. 128 Bergamot, amount of radiant heat absorbed by the perfume of, i. 44 Beroë Forskalia, structure of the, ii. 102, 103 Bhang, whence obtained, i. 427 intoxicating effect of, i. 427 Biddulphia pulchella, structure of, i. 198 Bignonia, fructification of, i. 381, 382 Bilin, polishing slate of, of what it consists, i. 206 Biscay, Bay of, zones of Algæ in the, i. 259 Bisection, propagation of diatoms by, i. 200, 204 Bismuth, diamagnetism of, i. 75, 76 chloride of, spectrum of, i. 146 Bittern, i. 18 Bleaching properties of:— chlorine, i. 19 bromine, i. 20 iodine, i. 21 Blechnum Spicant, structure, habitat, and mode of reproduction of, i. 356, 357 Blood, formation and functions of, ii. 2, 3 Blue dyes, i. 123, 124 Bog moss, structure, fructification, and habitat of, i. 332 Boleti, habitat and structure of the, i. 265 Boletus æneus, large amount of heat evolved by, i. 265 Bombyx rubi, fungi destructive of, i. 282 Boron, i. 18 whence obtained, i. 18 insolubility of, i. 18 heat at which it burns, i. 18 Botrychium, habitat of the genus, i. 366 Botrychium Lunaria, or moonwort, structure and habitat of, i. 366 Botryllidæ, or star-like Ascidians, ii. 224 Botrytis Bassiana, a fungus parasite of the silk-worm, i. 274 Botrytis curta, development of, i. 294 Botrytis, the cause of the murrain in potatoes, i. 284 structure of, i. 284 Brachionus pala, structure of, ii. 162-166 Brachyura, structure and mode of reproduction of, ii. 189-197 Brackens, i. 358 Brain, structure and functions of the, ii. 8 Branchipes stagnalis, structure of, ii. 210 Bread, fungus which attacks, hot from the oven, i. 296 Bread-fruit tree, food obtained from the, i. 426 Bristle fern, structure and habitat of, i. 361 Bromine, i. 18 whence obtained, i. 18 properties of, i. 20, 22 Professor Schönbein’s views as to, i. 20, 21 spectrum of, i. 21 amount of absorption of radiant heat by, i. 41, 42, 43 atomic weight of, compared with that of hydrogen, i. 100 spectrum analysis of, i. 140 Bryei, characters and structure of the, i. 329