278 INDEX. 



Frond, or thallus, of lichens, i. 301 



of ferns, i. 340, 341 

 Fruit, chemical combinations forming the perfumes of, i. 97 



preserved, greenish and grey moulds on, i. 285 



fungus on decayed, i. 290 



Fucacese, structure and fructification of, i. 244, 250, 251 

 Fuci, sexual fructification of, i. 253 

 Fucoidse, habitat of some, i. 256 



Fucus platycarpus, male and female cells of, i. 253, 254 

 Fucus vesiculosus, or bladder-wrack, structure and fructification of, i. 

 252, 253 



form of, in the Mediterranean, i. 258 

 Fuegians, staple food of the, i. 292 

 Funaria hygrometrica, structure of, i. 324, 327 

 Fungi, enormous numbers of, i. 260 



structure of, i. 260 



two principal groups of, i. 260 



families of, i. 261, et seq. 



poisonous matter in all, i. 264 



luminous, i. 264 



stems of, i. 268 



spawn of the gelatinous or creamy fungi, i. 269 



universality of the lower fungi, i. 273 

 destruction caused by them, i. 273 

 parasitic fungi, i. 274 



conidium, or spore-dust cell, i. 279 



propagation of fungi by fragments of spawn, i. 281 



extreme minuteness and profusion of fungi, i. 297 



sudden and often disastrous appearance of the lower fungi, i. 297 



conditions necessary to the development of fungi, i. 297 

 Furcellaria fastigiata, mode of reproduction of, i. 229 



structure and mode of reproduction of, i. 235, 238 

 Fusarium tremelloides, its identity with the nettle Peziza, i. 292 



G 



Galeolaria lutea, structure, development, and mode of reproduction of, 



ii. 107, 108 



Garancine, from what obtained, i. 124 

 Gas coal. See Coal gas. 

 Gases, absorption and radiation of radiant heat by gases and vapours, i. 38 



