( 429- ) 
INDEX. 
A 
Acid, hyposulphurous, and its compounds, page 8. — hyposulphuric, 
209. ^new one discovered in the Viburnum opulus, ib. — purpu- 
ric, ib. 
Adie, Mr, on a new hygrometer, made of the internal membrane of 
the Arundo phragmites, 32. — ^his description of the patent sym- 
piesometer, or new air barometer, 54. 
Agates, method of colouring, 341. 
Alison, Dr, on the physiology of the nervous system, 404. 
Alkali, new vegetable, called Strychnine, 210. — Another new one 
called Delphine, 418. 
Amici, M. on the motion of sap in vegetables, 214. 
Analysis, indeterminate, application of, to the elimination of the un- 
known quantities from two equations, 29. 
Anchors, method of weighing, used by the natives of the coast of 
Coromandel, 60. 
Ants, excavations of, at Valencia, 424. 
Apennines, geognosy of, 211. 
Apophyllite, on a new optical and mineralogical structure of, 1. 
Arhury Hill, verification of the latitude of, 200. 
Arragonite, structure of, 6. 
Asbestus fibres recommended for micrometers, £02, 
B 
Babbage, Mr, on prime numbers, 46. 
Boffins Bay, singular optical illusion seen in, 202. — account of the 
expedition to, 150. 
Bagnes, Val de, inundation of the, 187* 
Bald, Mr, on the temperature of air and of water in the coal-mines 
of Great Britain, 134. — on the skeleton of a whale discovered in 
Scotland, 393. — on coal fields, 409- 
Barlow, Mr, his discoveries in magnetism, 344. 
Bartholinus, Erasmus, his discoveries respecting double refraction, 
291. 
Barystrontianite, a new mineral, notice respecting it, 380. 
Beaufoy, Col. on the diurnal variation of the needle, 403. 
Beaver, fossil remains of, found in Perthshire and Berwickshire, 1 77, 
Bengal, progress of botany in, 376. 
Berzelius, M. on some compounds which depend on very weak af- 
finities, 63, 243. 
Biot, M. on the length of the seconds pendulum at Unst, 77. — on 
the magnetic qualities of mica, 206. — on the production of light, 
by bredcing glass-balls filled with oxygen, 209- 
VOL. I. OCTOBER 1819. F f 
