294 INDEX. 



Moon, interception of the heat radiated by the full, by the earth's 

 atmosphere, i. 55 



its effect on the higher regions of the atmosphere, i. 55 



chemical power of the moon's light, i. 55 

 Moonstone, or adularia, fluorescent property of, i. 66 

 Moonwort, structure and habitat of, i. 366 

 Morchella esculenta, the morel, i. 291 



catsup made from, i. 292 



Mordants for fixing dyes in cotton cloth, i. 125 

 Morphine, the probable narcotic principle of opium, i. 427 

 Mother-of-pearl, composition of, ii. 234 

 Motion, effect of, on molecular arrangement, i. 91 

 Moulds, fungus, on various substances, i. 285 

 Mucedines, structure of the, i. 283 



the origin of all fermentation, i. 289 

 Mucorini, or moulds, structures of the, i. 296 



habitat of the, i. 296, 297 

 Muriatic acid, formation of, i. 20 



action of, upon ammonia, i. 120 

 Musci, or Mosses, structure and mode of reproduction of, i. 3 



antheridia of, i. 324 



sporangia of, i. 325 



gemmae or buds, i. 327 



leaves of, i, 330 



aquatic mosses, i. 331 



peat, i. 333 



uses of mosses, i. 334 

 Muscle, structure and functions of, ii. 2 



functions of the muscles, ii. 5 



electric currents formed in the muscles, ii. 7 



muscular respiration, ii. 8 

 Mushrooms, i. 261 



mycelium, or spawn, i. 262 



Musk, power of absorption of radiant heat by the perfume of, i. 45 

 Mussel, structure of the gills of the common, ii. 230 

 Mycelium or mushroom spawn, i. 261, 262 

 Mysis, or opossum shrimps, structure of, ii. 199 

 Myxogastres, structure, habitat, and reproduction of, i. 269, 270 



their Amosba-like motions, i. 270 



