INDEX. 
— 
CADEMY of Sciences in St. Peters- 
burgh, abstracted statement of the 
weather during the 20 years, from 1772 
to 1792, 13. 
Acetic acid, effects of, upon Brazil wood 
paper, 25. 
Acetate of copper, composition of, 164. 
Acid, formic, preparation of, from tartaric 
acid, 311. 
— melanic, name proposed to distin- 
guish a peculiar substance found in black 
urine, 69. 
— sulphuric, diluted ; changes effected 
by it on the colour of Brazil wood pa- 
per, 24, 
—— sulphurous, 
wood paper, 24. 
— tartaric, preparation of formic acid 
from, 311. 
Acids and alkalies, remarks on certain 
substances which appear to act as both, 
3. 
— use of tincture of Brazil wood in 
distinguishing, 23. 
Adams, Mr. on finding the sines of the 
sum and difference of two arcs, 21—on 
logarithmic and circular series, 261—on 
compound interest, 450. 
Aerolite, ancient, notice respecting, 470. 
Alkaline sulphurets, extract from the me- 
moir of M. Berzelius upon, 284, 343. 
Alkohometrical application of the thermo- 
meter, 396. 
Alumina, its powers as a base considered, 
effects upon Brazil 
sulphate of, on a peculiar, 280. 
America, progress of mineralogy in, 76. 
Amphibolic minerals, analysis of, 316. 
Analysis of the aerolite which fell at Ju- 
venas, 74. 
amphibolic minerals, 316. 
chromate of iron, 76. 
——— colophonite, 396. 
—_——_ common verdigris, 161, 
——-—— diaspore, 146. 
——_——-an iron ore from Brazil, 310. 
———— _jeffersonite, 234. 
a new lead ore, 117. 
the magnesian minerals of 
Hoboken, 75. 
magnesite, 389. 
-—— mica, 256. 
-—————— native carbonate of magnesia, 
389, 
—w 
— 
Analysis of pulvis antimonialis, 266. 
——— pyroxene, 396. 
sulphate of alumina, 280. 
—— the sulphuret ofmolybdenum, 
76. 
~— tabular spar, 396. 
— ultimate of vegetable and ani- 
mal substances, 424, 
Angers, fall of a meteorite at, 313. 
Apjohn, Dr. additional remarks on the 
influence of moisture in modifying the 
specific gravity of gases, 145, 
Ares, two, on finding the sum and differ. 
ence of, 21. 
Arsenic acid, effects of, upon Brazil wood 
paper, 25. 
detection of minute quantities of, 
127. 
test, new one for, 77. 
Arsenious acid, effects of, upon Brazil 
wood paper, 25. 
Ascension, right of § Urse Minoris, 129. 
Asia Minor, analysis of magnesite from, 
389. 
Astronomical observations, 27, 171, 277, 
357, 450. 
————— Society of London, analysis 
of the Transactions of, 148, 223. 
Atmosphere, on the finite extent of, 251. 
Azotic springs in North America, 470, 
B. 
Babbage, Mr. analysis of his letter to Sir 
Hi. Davy on the application of machi- 
nery to the purpose of calculating and 
printing mathematical tables, 383. 
Balls, cannon, conversion of, into plum- 
bago, 77. 
Barlow, Mr. on the mathematical laws of 
electro-magnetism, 470. 
Barometer, extraordinary depression of, 
Dec. 25, 1821, 263. 
Beaufoy, Col. astronomical observations 
by, 27, 171, 277, 357, 450—experi- 
ments and calculations for comparing 
the force of a body in motion with dead 
weight, 165, 
Berthier, M. analysis of native carbonate 
of magnesia, 369—analysis of magne- 
site, 389. 
Berthollet, Count, notice of death of, 469, 
