Magnussen Soeiuind, iesrription of 

 remarkalJe enipiioi. iu Iceland. 

 231. 



ftiahlinam, Wilhelm, south-west direc- 

 tion of the aerial current iu the 

 middle latitudes oi' the temperate j 

 Z(.ne, 322. 



Muiran, un the Zodiacal light, 127, 

 128, 131; his opinion that the Sun 

 is a nebulous star, 130. 

 Malapert, annular mountain, 83. 

 Malle, Dureau de la, 220. 

 Man, general view of, 360369; 

 proois of the flexibility of his nature, 

 5 ; results of his intellectual pro- 

 gress, 34,35; geographical distribu- 

 tion of races, 360 366 ; on the as- 

 sumption of superior and inferior 

 races, 361368; his gradual recog- 

 nition of the bond of humanity, 368, 

 369. 



Mantell, Dr., his ' Wonders of Geo- 

 logy,' see notes bv Translator, 25, 

 4$,'46, 198, 277, 280, 284, 286, 287, 

 291; 'Medals of Creation,' 26,273, 

 286,291. 

 Margarita Philosophica, by Gregory 



Reisch, 39. 



Marius, Simon, first described the ne- 

 bulous spots in Andromeda and 

 Orion, 127. 



Martins, observations on polar bands, 

 192; found that air collected at 

 Faulhora contained as much oxygen 

 as the air of Paris, 317; on the dis- 

 tribution of the quantity of rain in 

 Central Europe, 341; doubts on the 

 greater dryuess of mountain air, 

 342. 

 Matthiessen, letter to Arago on the 



Zodiacal light, 132. 

 Mathieu, on the augmented intensity 

 of the attraction of gravitation in 

 volcanic islands, 159. 

 Mayer, Tobias, on the motion of the 



Solar System, 136, 138. 

 Mean numerical values, their necessity 



in modern physical science, 64. 

 Melloni, his discoveries on radiating 



heat and electro-magnetism, 29. 

 Menzel, unedited work by, on the flora 



of Japan, 356. 

 Messier, comet, 94; nebulous spot re- 



9*'inbling our starry stratum, 141. 

 Meuunorphic Rocks. See Rocks. 



Meteorology, 31"- -846. 



Meteors, see Aerolites; meteoric info 



soria, 354, 355. 

 Methoue, Hill of, 239. 

 Meyen, on forming a thermal scale ol 

 cultivation, 331 ; on the reproduc- 

 tive organs of liverworts and alga;, 

 350. 



Meyer, Hermann Von, on the organi- 

 zation of flying saurians, 276. 

 Milky Way," iu figure, 73 ; views of 

 Aristotle on, 88: vast telescopic 

 breadth, 140, 141; milky way of 

 nebulous spots at right angles with 

 that of the stars, 141, 142. 

 Minerals, artificially formed, 269, 270. 

 Mines, greatest depth of, 148, 149, 



150; temperature, 149. 

 Mist, phosphorescent, 131. 

 Mitchell, protracted earthquake shocks 



in North America, 207. 

 Mitscherlich, on the chemical origin ol 

 iron-glance iu volcanic masses, 232; 

 chemical combinations, a means of 

 tlirowing a clear light on geognosy, 

 256 ; on gypsum, as a uniaxai crys- 

 tal, 259; experiments on the simul- 

 taneously opposite actions of heat on 

 crystalline bodies, 260; formation 

 of crystals of mica, 26 1 ; on artificial 

 mineral products, 269, 270, 273. 

 Mofettes, (exhalations of carbonic acid 



gas), 211 216. 

 Monsoons, (Indian), 322, 323. 

 Monticelli, on the current of hydro. 

 chloric acid from the crater of Vesu- 

 vius. 233 ; crystals of mica found in 

 the lava of Vesuvius, 261. 

 Moon, the, its relative magnitude, 80; 

 density, 80, 81; distance from the 

 earth, 81, 82; its libiation, 83, 155; 

 its light compared with thae of the 

 Aurora, 196, 197; volcanic action 

 in, 226. 

 Moons, or satellites, their diameter 



distances, rotation, &c., 80 84. 

 Morgan, John H., 'OR the aurora bo- 

 realis of Oct. 24, 1847.' See Trans- 

 lator's notes, 188, 1 94. 

 Morton, Samuel George, his magnifi- 

 cent work on the American Race*, 

 362. 



Moser's images, 107. 

 Mountains, in Asia, America, and 

 Europe, their altitucje scenery, aud 



