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it receives from the public, I have obtained the cooperation of Mr. RICHARD TAYLOR, a gentleman from whose exertions, in conjunction with my own, and none I am sure will be wanting,- I may, without presumption, hope that The PhilosoPHICAL MAGAZINE and JOURNAL will increase in interest and general utility.

ALEX. TILLOCH.

London, July 31, 1822.

Communications for the Philosophical Magazine and Journal are requested to be addressed in future to the Editors, care of R. and A. TAYLOR, Shoe-Lane.

CONT EN TS

OF THE SIXTIETH VOLUME.

5

8, 102

FURTHER Observations on Dr. Reade's Papers on Refraction
An Account of the Repeating Circle, and of the Altitude and

Azimuth Instrument .
On the Hypothesis of Gaseous Repulsion .

18 On the Solar Eclipse which took place on September 7, 1820 25 Account of a successful Experiment to prevent the injurious

Effects resulting from the Diffusion of arsenical Vapours from Copper-smelting Furnaces

32 On the Connexion between the Leaves and Fruit of Vegetables, 8c.

38 Further Remarks on the new Method of determining the Lati

tude of a Plaçe, by Observations of the Pole-Star. 43 True apparent Right Ascension of Dr. MASKELYNE's 36 Stars for every Day in the Year 1822, at the Time of passing the

Meridian of Greenwich On the Rollen of Flowers

56 On the Heat produced by Chlorine, and on a singular Effect produced by Lightning

61 A Reply to Mr. John MURRAY, “on the Apparatus for restoring the Action of the Lungs in apparent Death

62 On the Chemical Composition of white efflorescent Pyrites 65 On the Hygrometer by Evaporation

81 On a new Theory of the Tides

88 On Chlorine and Chlorate of Potassa .

100 Report of a Committee of the House of Commons on Steam-Boats ;

being the Fifth Report on the Roads from London to Holyhead, Sc..

113,257 Vol. 60. 1822,

49, 93

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Fossil Bones on the Coast of East Norfolk

132

On the Origin and Discovery of Iron.

161, 249

Suggestions for simplifying Mr. Ivory's Solution of the Double

Altitude Problem

167

On the Relation of Acids and Alkalis to vegetable Colours, and

their Mutations thereby

170

New Demonstrations of the Method invented by Budan, and

improved by others, of extracting the Roots of Equations 173

On the Electrical Phænomena exhibited in Vacuo .

179

On Mr. John Moore Junior's Reply

186

On the Causes of a singular partial Failure in a Crop of Tur-

nips

187

On the Stars forming the Pleiades .

189

Reply to Dr. Apjohn's " Additional Remarks," &c. in The

Annals of Philosophy for September 1822

193

On simultaneous Thunder-Storms.

195

Remarks respecting Astronomical Observatories

197

A Letter to Professor Millington, of the Royal Institution, re-

specting some Frigorific Experiments made on the Magnetic

Fluid, and on Sea-Water .

199

On Lithographic Printing :

206

Short Account of the Rocks in the Neighbourhood of St. John's,

Newfoundland, .

206

Reply to Captain FORMAN's Theory of the Tides

211

On the proposed Alteration of Weights and Measures, and the

Adaptation of Gauging Apparatus thereto

241

On an Improvement in the Apparatus for procuring Potassium

247

On the Application of Magnetism as a Measure of Electricity 253

On the Repeating Circle improved according to the Suggestion

of Baron Zach: and on taking Observations of the Pole-

Star

263

Analysis of Air taken from an Ice-House

266

A Defence of the new Theory of the Tides

267

On reducing the Lunar Distance

271

On some new Tables of Aberration and Nutation

279

D.'s Second Reply to Ç. on Mr. HERAPATH's Theory 285

On a new Sextant recently invented and constructed by Pro-

fessor AMICI.

301

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Observations on the occasional Appearance of Water in the Ca-

vities of regular Crystals; and on the porous Nature of Quartz.

and other Crystalline Substances, as the probable Cause of that

Occurrence

310

On a new 'circular Micrometer

314

Mr. P. Taylor on Pyroligneous Æther

315

On a Lunar Iris, or Rainbow by Moonlight

317

Note on Mr. MURRAY's Paper on the Relation of Acids and

Alkalies to Vegetable Colours

319

On the Measurement of the Progress of an Eclipse of the Moon

with a Sextant or Reflecting Circle

329

Reply to Captain FORMAN on the Theory of the Tides 335

Observations on the Flexure of Astronomical Instruments. 338

On Governor Ellis's Discovery of the Action of Cold on Mag-

netic Needles

340

Description of a new Printing Press

341

Autumnal Blowing of the Narcissus

343

On the anomalous magnetic Action of hot Iron between the white

and blood-red Heat

343

On Smut in Wheat

350

Description of Hemipodius nivosus; a new Bird fr.om Africa,

353

A Letter from JOHN POND, Esq. Astronomer Royal, to Sir

Humphry Davy, Bart. President of the Royal Society, rela-

tive to a Derangement in the Mural Circle at the Royal Ob-
servatory.

355

On the Subsidence of aqueous Vapour, and its Repose on the

Beds of Rivers

357

Notice of some new Galvanic Experiments and Phenomena 358

On the North Polar Distances of the principal fixed Stars, de-

duced from the Observations made at the Royal Observatory
at Greenwich

361

Experiments on the. Alloys of Steel, made with a view to its Im-

provement

*355, 363

Mr. Moore on Mr. J. MURRAY's Communications 374

Inquiry respecting Floods in Dorsetshire

377

On the Origin of the Blast Furnace

401

Description of a Life-Bout, built by Subscription at Ipswich,

and stationed at Landguard Fort

409

On the Measurement of Timber

418

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