( 409 ) 
INDEX. 
A 
Mschoh on the skeletons of insects, 187- 
Alexander i Mr James, on blowing sand, 404. 
Alkohometer, 214. 
Alloys of steel, 350. 
Alimiy analysis of, by Dr Thomson, 185. 
Analysis of minerals, on the optical, 12. — comparison of the optical, 
chemical, and crystallographic, id. 
Animalcules 3 spermatic, in different animals, 247* 
Apopkyllitesy analysis of the, 1. — on a peculiarity in the extraordi- 
nary refraction of, 136.— on the cause of this peculiarity, 142. 
Arctic gully remarks on the, 90. 
Arnoldy Dr, on meteorological observations at Port Antonio, 255. 
Atmosphere, on the finite extent of the, 157* 
Aurora borealis in Faroe and Shetland, 182. 
B 
Babbage, Mr C. on machinery for calculating and printing mathe- 
matical tables, 274. 
Baird, Mr John, on the rock of Gibraltar, 75. 
Bald, Mr, on a steam passage-boat, 365. 
Barlow, Mr Peter, on the anomalous magnetic action of hot-iron, 239- 
— ^on the mathematical laws of electro-magnetism, 281. 
Barometer, on the great depression of, on the 25th December 1821, 
182. 385, 386. 
Battas, on the customs of the, 87- 
Bays, on the formation of, 151. 
Beaufoy, Colonel, his magnetical observations, I6I. 
Berzelius, on the analysis of some minerals of the zeolite family, 1.. 
— on the effect of heat on the spinelle of Ceylon and Aker, 180. 
Bessel, Professor, on the declination of 36 fixed stars, 225. 
Beudant, M. on the natron lakes of Hungary, 259. — on sulphate of 
soda, 265. — on saltpetre, 266. — on the pitchstone of Saxony, 267. 
— on the mineralogical school of Freyberg, 273.— on the opals of 
Hungary, 332. 
Bismuth, subnitrate of, used in intermittent fevers, I9I. 
Black lead from cast-iron, I97. 390. 
Blood, on the size and shape of the globules of, in different animals, 
190. 
Blowing machine used at the Hartz described, 37^. 
Blowing sand, 404. 
Bones, fossil, 188. 
Brewster, Dr, on the optical analysis of minerals, 12. — on the opti- 
cal phenomena of apophyllite, 142. — on a singular experiment de- 
pending on the polarisation of light by reflexion, 1,46.— .on a mo- 
