1 N D E X. 
A 
Achminatic object-glasses, on the determination of the radii of double 
ones, by Mr Herschel, 36 1. ^ 
Adams y Mr, on an extraordinary cave in Indiana, 29- 
Mthrioscope, invented by Dr Wollaston, 176. — description of a new 
and portable one by Mr John Murray, 356. 
AikiTii Mr A. his method of protecting steel articles from rust, 298. 
Air, on the difference between sea and land, 388. 
Alphabet, account of a new one, with strings, for the use of the blind, 
194 . 
Alpnach, account of the slide of, 338. 
Anglesea, on the Geology of, 376-7. 
Apophyllite, analysis of, 393. 
Arfwedson, M. on lithion, 12. — his analysis of various minerals, 13. 
Arseniates of copper, described by M. Brooke, 132. 
Amphiholes, on the analysis of the, 1 6. 
Analcime, analysis of, 14. 
Arsenic, tests for, by Dr Poster, 180. 
Artichokes, on the ancient history of, 264. 
Asparagus of the ancients, 260. 
Astrono^nical 3o\JiTn3^, 174. — Observations by Colonel Beaufoy, 175. 
Aurora, account of a remarkable one, 175. 
Aurora Borealis, remarkable one seen in Scotland, 380. 
Azalea, remarks on, 47. 
B 
Babbage, Mr, on barometrical observations made by himself and Mr 
Herschel, at the fall of the Staubbach, 224. 
Barlow, Mr, on the magnetism of red hot iron, 360. 
Barometer, extraordinary fall of, at Geneva and elsewhere, 383. 
Battle-axe of pure copper, found in Ratho Bog, 357- 
Beaufoy, Colonel, his astronomical observations, 175. 
Beek, Van M. on electro-magnetism, 83, 220. 
Berzelius, M. on the alkaline sulphurets, 1. — on the composition of 
the oxides of platinum and gold, 9. 
Bloodletting, account of the method of, used in Shetland, 255. 
Blowpipe, M. Berzelius's work on the, 391. , 
Bonsdorff’s analysis of the amphiholes, 17- — on red silver-ore, ib. 
Bowdich, Mr, his zoological works, 3Q5. 
Bowditch, Mr N. on the comet of 1819, 379- — on the meteor of 1819, 
380. 
Brasier, Mount, on detonations in, 401. 
Brewster, Dr, on vision through colouretl glasses, 102. — -on the insen- 
sibility of the eye to certain colours, 140. — on a remarkable aurora 
seen in Inveriiesshire, 175. — on a remarkable dichroism in tpurma- 
