406 INDEX. 
M 
Macculhchf Dr, on peat, 40, 201. 
Mackenzie, Sir G. on Menge's Journey in Iceland, 249.— on Sound, 
374. 
Malaria, on the Nature of, 374. 
Marcel, Dr, on the specific gravity of Sea-Water, 356. — on the 
Composition of sea- waters, 361. 
Marsh Poison, on the nature of, 375. 
Marbles antique, history of, 350. 
Mean Temperature of the year, 382. 
Medallions, method of forming them by calcareous springs, 297. 
Meionite, optical properties of, 301. 
Membrane, new one in the human eye, 397. 
Menge, M. his account of a journey through East Iceland, 156.— 
observations on it by Sir George Mackenzie, 249. 
Meteorological Journal for 1819, S69. 
Micrometers, account of Mr Watt’s new ones 121 
Microscope catoptrical, account of Amici’s, 1 35. 
Mineralogical account of Elba, 177. 
Minerals of Minas Geraes in Brazil, 1 89. 
Minerals, on the colour of, I94, 346. 
Mists, theory of, 185. 
Mollusca, marine and river, in Livonia, I90. 
Montreal, storm at, 384. 
Morton* s patent slip, account of, 125. 
Mosaic, manufacture of at Rome, 348. 
Mother-of-Pearl, Mr Herschel’s observations upon, 114. 
Miisci, germination of, 192 — on the growth of, 392. 
N 
Neill, Mr, on the Ayrshire rose, 102, 
Nickel, new ore of, 385. 
Nitrate of Lead, refractive power of, 184. 
O 
Obliquity of the ecliptic, 378. 
Obsidian, effect of heat on, I95. 
P 
Pallas, elements of its orbit, 183. 
Paper, on sugar from, 363. 
Patella distorta of Montagu, I90. 
Patents, list of Scottish, I99, 402. 
Passage-Boat of malleable iron, 222* 
Paxton, Rev, Mr, on a new method of uniting bee-hives, 133. 
Peat, on the origin and formation o^ 40. — mountain peat, 42.*^’ 
mai^h ditto, 42.' — lake ditto, 43. — forest ditto, 47.— “time requir^^ 
ed for producing peat, 53.— chemical properties of 201.— pro- 
bable conversion of peat into coal, 214. 
l^ndulum. Captain Kater’s experiments on the length of, 319* 
Perspective machine, Mr Watt’s, 259* 
Petalite, optical properties of, 380. 
Phosphorescence of ffuor-spai-, 171. 
