INDEX. 11 



Mixture, of dephlogisticated and inflammable air not exploding in red heat, 



V, 42. 



iron filings and sulphur absorbs fixed air, V, 12. 



Moon, see Eclipse, 



Mortar, what kind of, used in India, VI, 379, 380, 383. — use of brick-dust 

 in, 285, & seq. 



Mug-ford, Capt. William of Salem, his account and description of a tempo- 

 rary rudder invented by himself, VI, 203. 



Muriate of soda, exceedingly rare in its pure state, V, 143. 



Muscipula, vegetable, memorandum concerning a new, VI, 79. 



Musk, impurity of the air confined with, V, 10. 



N 



Natchez, astronomical and thermometrical observations made at, V, 172 — 

 190 longitude of, V, 188, VI, 159, 225, 297, 361 latitude, V, 190, 



VI, 297. 



Nautical Chart, description and use of a new and simple one for working 



the different problems in navigation &c. VI, 303. 

 Navigation, use of the thermometer in, V. 90. 

 Nexv-Orleans, astronomical and thermometrical observations made at, V, 



191 — 197 longitude of, V, 196, 197, VI, 159, 222, 297 latitude 



V, 196, VI, 159, 297. 

 New-York, longitude of, VI, 297, 360. — latitude, VI, 269, 297. 

 Nickel, "oxide of, contained in meteoric stones, VI, 339. 

 Nitre, found in common salt when frequently mixed with snow, VI, 129. 



obtained from several caves in Kentucky, VI, 236.' — from sand works, 



241. — quantity contained in the rock ore, 242. 



vapours of spirit of, observations and experiments on, V, 2. 

 Nitrate of potash, see Saltpetre. 

 Nitric acid, various combinations of, VI, 245. 

 Nitrous acid, how found in the atmosphere, VI, 131. 

 Nitrous air, see Air. 



O 



Observations, meteorological, made near the Mississippi for 1799, VI, 9. 

 Occultation, of o in Sagittarius by the disk of the moon, VI, 160. 



$ by the moon, VI, 369. — of different stars by the moort, 



360, 361. Vide Ortis. 

 Occultations, table of the results of three of the stars by the moon, 350. 



Officers, of the Society, V, xii. — for 1804, VI, v for 1809, xxi. 



Ohio, geographical positions of various places on, VI, 159. 



Oleander, Neriian, destructive to insects, VI, 81. 



Oniscus prcegustator, description of, V, 77. 



Ortiz, Don Julian de Canelas, his observations of the occultation of the I 



satellite of Jupiter by the moon, VI, 225, 226. 

 Oxidation, of metals centrated, V, 33. 

 Oxigen, none in finery cinders, V, 33. — little in flowers of zinc, 34. 



