INDEX. CXX1X 



Maximilian (Prinz, zu Wied), on the American race, Note 434. 



Mean numerical values, their importance in modern physical science, p. W. 



Mean state of phenomena, p. 17, 18. 



Melloni, on radiant heat and electro-magnetism, p. 32. 



Menzel, first use of the term "geography of plants" in an unedited flora of Japan, 

 p. 347. 



Messier's, comet, p. 101, see Comets. Nebula, nearly resembling our own 

 sidereal system, p. 141. 



Metamorphic, see Rocks. 



Meteors, meteoric stones, &c. see Aerolites. 



Meteorology, p. 304338 ; Notes 375 -419. Editor's note on, addition to Note 382. 



Meteorological observations, see Magnetical observatories (or stations). 



Methone, elevation of the hill of, p. 230. 



Meyen on the reproductive organs of liverworts and algae, p. 340. On a thermic 

 scale of cultivation, p. 321 ; Note 395. 



Meyer (Hermann von), on Saurians and flying saurians, Notes 303, 305. 



Milky way, p. 80, 96, 140142 ; Notes 109, 110, 113. Nebulous, p. 141. 



Minerals, artificial formation of, p. 257 ; Notes 292294. 



Mines, depth of several, Note 124. Temperature of, Note 138. Earthquake 

 movements in, Note 189. 



Mitchell, earthquake movements or tremblings of the ground in North America, 

 Note 188. 



Mitscherlich, on the influence of temperature on the axes of crystals, p. 248 ; 

 Notes 263, 266. On the melting point of granite, Note 13. On the chemical 

 origin of specular iron in volcanic masses, Note 222. Light thrown on geology 

 by chemical combinations, p. 245 ; Note 25S. On the artificial production of 

 minerals, Notes 292, 294. 



Monsoons, p. 311 ; Note 389. 



Moon, p. 87,88, 90, 91 ; Notes 40, 41. 



Monticelli, on hydrochloric acid exhalations in an eruption of Vesuvius, Note 196. 

 On crystals of mica in the lava of Vesuvius, Note 270. 



Morton (Samuel George), his fine work on the American race, Note 434. 



Moser's, pictures, p. 189. 



Mountains, the elevation, scenery and vegetation of different, and chains of, in 

 America, Asia, and Europe, p. 9-14; Notes 26, see Cordilleras, and Hima- 

 laya. Influence of, on climate, natural productions, and human affairs, 

 p. 152, 291, 292, 324. Elie de Beaumont's views on the relative age of different 

 chains of, p. 34, 291294 ; Note 361. Decrease of temperature and cor- 

 responding zones of vegetation on the declivities of, p. 11 13, 324327, 346 ; 

 Notes 5, 6, 399, 429. Limit of perpetual snow on, or snow-line, p. 326330; 

 Notes 5, 403. 



Mud volcanoes, see Volcanoes and Salses. 



Aliiller (Johannes), on races of plants, animals, and men, p. 352 ; Note 438. 

 Muncke, on the prevalence of auroras in particular districts or zones of longitude, 



p. 184 ; Note 176. 



Mundus, origin and derivation of the term, p. 57. 



Murchison, period of the Paleosaurus and Thecodontosaurus, p. 263. Description 

 of a fissure through which melaphyre has been ejected in a co;,i mine, Note 

 260. His general classification of the older fossiliferous rocks, Note 314. 

 Muschenbrock, in the middle of the last century, called attention to the frequency 



of meteors in August, p. 115 ; Note 73. 

 Nature, import of the term, p. 22, 69, 71. Systems of, p. 30. Philosophy of nature, 



