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NUMBER IV.-OCTOBER.

On a new Class of Compounds of Sulphur. By Dr. Zeise......

241

Reply. to Mr. Winch. By Messrs. Young and Bird.....

247

On the Finite Extent of the Atmosphere. By Dr. Wollaston..

251

Analysis of Mica. By M. Rose....

256

On the Specific Gravity of Gases. By Charles Sylvester, Esq.... 260

On Logarithmic and Circular Series. By Mr. James Adams.

261

On the Depression of the Barometer on Dec. 25, 1821. By Professor

Brandes .....

263

On the Pulvis Antimonialis of the London Pharmacopeia. By Richard

Phillips, FRS. L. & E. &c. .....

266

Principal Characters of the Earths and Metallic Oxides before the Blow-

pipe. By J. G. Children, Esq. FRS. &c......

271

Astronomical Observations. By Col. Beaufoy, FRS......

277

Notice of Capt. Scoresby's Voyage to Greenland. By Dr. Traill. ... 277

Curious Substance formed from the Wine of the Sugar Cane..... 279

On a peculiar Sulphate of Alumina. By R. Phillips, FRS. L. & E. 280

On the Composition of the Alkaline Sulphurets. By M. Berzelius...... 284

Anaiytical Account of Transactions of the Cambridge Philosophical So-

ciety for 1822. Vol. I. Part II. (concluded)...

289

Bewick's History of British Birds....

294

Proceedings of the Geological Society, June 21

308

Analysis of an Iron Ore from Brazil.

310

Geology of the Sierra Nevada of Grenada..

310

Preparation of Formic Acid from Tartaric Acid....

311

Bezoars voided by a Woman.

312

Fall of a Meteorite at Angers.

313

Case of a Man swallowing Clasp Knives

314

Analyses of the Amphibolic Minerals.

316

Electro-magnetic Experiment.

318

New Scieritific Books...

318

New Patents..

318

Mr. Howard's Meteorological Journal for August.

319
NUMBER V. NOVEMBER.

Sketch of the Geology of Snowdon, and the surrounding Country. By

W. Phillips, FLS. MGS.; and S. Woods, MGS...

321

On Siliceous Petrifactions imbedded in Calcareous Rock. By the Rev.

J.J. Cony beare, MGS.....

335

On the Geology of the Malvern Hills. By the Rev. J.J. Conybeare, MGS. 337

Reply to Messrs. Young and Bird. By N. J. Winch, Esq.

339

On some peculiar Crystals of Sulphate of Potash. By R. Phillips, FRS.

L. & E. FLS. &c. ; and W. Phillips, FLS. &c. (With a Plate.)... 340

On the Composition of the Alkaline Sulphurets. By M. Berzelius (con.

tinued).....

343

Astronomical Observations. By Col. Beaufoy, FRS.

357

On the Ductility of Glass. By J. Deuchar, Esq.

358

A Proposal for impelling Steam Vessels by horizontal Motion instead of

Circular. By the Rev. W. Ritchie .........

361

Some Improvements of Lamps. By James Smithson, Esq. FRS..... .... 363

On Works in Niello and the Pirotechnia of Venoceio Biringuccio Siennese.

By the Rev. J. J. Conybeare, MGS. .........

364

Analytical Account of Philosophical Transactions for 1822. Part I.... 370

Letter to Sir H. Davy from Mr. Babbage on the

Application of Machinery for the Purpose of Calculating and Printing

Mathematical Tables ..

383

Proceedings of the Geological Society, June 21

388

Effect of Fixed Oils in destroying the Smell of Essential Oils.

388

Analyses of Magnesite. ....

389

Analyses of Native Carbonate of Magnesia

389

On the Greek Fire of the Middle Ages

389

Royal Institution of Cornwall. ...

395

Alkohometrical Application of the Thermometer.

395

Tabular Spar, Colophonite, and Pyroxene

396

Death of Dr. Marcet. .....

397

Death of Mr. James Sowerby

397

New Scientific Books.

397

New Patents ....

398

Mr. Howard's Meteorological Journal for September.

399

ERRATA.

Page 23, line 18, for Tincture and, read Tincture of. 168, ll, for elasticity, read velocity.

40, for 277,93 tons, read 1243,7 tons.

41, for 271,15 feet, read 573,5 feet.
297, 29, for purchases, read purchasers.
298, 22, for Falcoæ, read Falco.
300, 48, for Montano, read Montana,
301, 34, for Ortherea, read Ætherea.

19, for Blougios, read Blongios.
47, for Fero, read Fern.

3, for Islandicas, read Islandicus.
14, for unexplained, read unexplored.
46, for Fascus, read Fuscus.

303,

304,

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