10 INDEX. 



Magnesia, contained in sea-water, V, 141. — in meteoric stones, VI, 339. 



Marine acid, action of its vapour, V, 3, 7. 



Marshes, on the circular form of, in the country of Apelousas, VI, 58. 



Maryland, mineralogical observations on the state of, VI, 319. 



Mercury, passage of, over the disk of the sun, VI, 356. 



Metals, theory of oxidation of centrated, V, 33. 



Meteors, account of an extraordinary flight of, VI, 28. 



Meteoric stones, on the origin and composition of those which fell from the 

 atmosphere at Weston, state of Connecticut, VI, 324. — appearance and 



progress of the meteor, 324, 325, 326 its extent 326 diameter of 



the body, 326. — consequences of the explosion, 327 circumstances 



attending the first explosion, 327. — circumstances attending the second 

 explosion, 328, 329, 330. — third explosion, 330. — description of the 

 specimens found, 332.. — distinct kinds of matter visible to the eye, 333. 

 —chemical analysis of, 334. — hypothesis of President Clapp on, 335. — 

 experiments on the stone at large, 336. — on the pyrites, 340. — on the 

 malleable iron, 341.. — on the irregular black masses, 342. — on the ex- 

 ternal crust, 342. — on the globular bodies, 343. — paper on the meteoric 

 stones, by F. R. Hassler Esq. 400. 



Meteorological observations, made near the Mississippi for 1799, VI, 9 — 23, 

 43 — 55, 188. 



Method, for finding the equation for the change of the sun's declination &c. 

 VI, 26. — of projecting and measuring plane angles, 29. 



Mica, found in the alluvial soil of Maryland, VI, 319— contained in the 

 gneiss of the same state, 321. 



Mineralogical nomenclature, according to Werner's system, VI, 412. 



observations, on the state of Maryland, VI, 319. 



on the U. S. in general, see Maclure. 



Miscellaneous experiments, on Phlogiston, V, 28. 



Mississippi, periodical inundations of, VI, 165, 166, 167. — highest perpen- 

 dicular ascent from the lowest ebb, 165. — width of its principal chan- 

 nel below the Ohio, 170 depth from New-Orleans to its mouth, 172. 



— depth at Natchez, 172. — depth below the Ohio, 173. — utility of its 

 inundations for the culture of rice, 176. — excess of inundation how 

 injurious, 177. — prudential exertions against the excess of inundation, 

 177. — salubrity of its water, 177, 178.. — comparison between the Nile 

 and this river, 178 — 181. — elevation of tides and their progress up 



the river, 183. — velocity of its stream, 184 changes of its bed, 185. 



. — additional observations on its depth and velocity, 200, & seq. 



Territory, Latitude N. 31° 28' Longitude 91° 30'. — meteorological 



observations made there, and account of the progressive vegetation 

 during every month of the year 1799, VI, 11. — monthly recapitulation 

 of meteorological observations during 1800, 43. — budding, blooming, 

 fructification of trees and plants, 44 — 48. — times when domestic ani- 

 mals bring forth their young, 47, 48. — general state of the weaiher 

 in all the months in the year, 44 — 48. — general account of the climate, 

 48 — 55. — monthly and annual results of meteorological observations 

 made there for the years 1801, 1802, 1803; 188. 



Mitchell Samuel L. his observations on the soda, magnesia and lime con- 

 tained in the water of the ocean, &c. V, 139. 



