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.

London, July 31, 1822.

ALEX. TILLOCH.

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.

CONTENTS

OF THE SIXTIETH VOLUME.

FURTHER Observations on Dr. READE'S Papers on Refraction

5

An Account of the Repeating Circle, and of the Altitude and

Azimuth Instrument.

8, 102

18

On the Hypothesis of Gaseous Repulsion.

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

38

On the Connexion between the Leaves and Fruit of Vegetables,

&c.

Further Remarks on the new Method of determining the Lati-

tude of a Place, by Observations of the Pole-Star.

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

43

49, 93

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 restor-

ing the Action of the Lungs in apparent Death".

On the Chemical Composition of white efflorescent Pyrites

62

65

81

8.8

100

On Chlorine and Chlorate of Potassa.

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

being the Fifth Report on the Roads from London to Holy-

head, &c.

113,257

132

161, 249

Fossil Bones on the Coast of East Norfolk

On the Origin and Discovery of Iron.

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

On Mr. JOHN MOORE Junior's "Reply"

.

179

186

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

On the Stars forming the Pleiades.

187

189

Reply to Dr. APJOHN'S "Additional Remarks," &c. in The

Annals of Philosophy for September 1822

On simultaneous Thunder-Storms.

Remarks respecting Astronomical Observatories

193

195

197

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

specting some Frigorific Experiments made on the Magnetic

Fluid, and on Sea-Water

On Lithographic Printing

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

Newfoundland

On the proposed Alteration of Weights and Measures, and the

Adaptation of Gauging Apparatus thereto

On an Improvement in the Apparatus for procuring Potassium

241

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

Analysis of Air taken from an Ice-House

A Defence of the new Theory of the Tides

On reducing the Lunar Distance .

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

On a new Sextant recently invented and constructed by Pro-

fessor AMICI..

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

314

315

317

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

Alkalies to Vegetable Colours

319

On a Lunar Iris, or Rainbow by Moonlight

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

with a Sextant or Reflecting Circle

329

335

Reply to Captain FORMAN on the Theory of the Tides.

Observations on the Flexure of Astronomical Instruments. 338

On Governor ELLIS'S Discovery of the Action of Cold on Mag-

netic Needles ·

340

341

343

On the anomalous magnetic Action of hot Iron between the white

and blood-red Heat

343

350

On Smut in Wheat

Description of Hemipodius nivosus; a new Bird from 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

357

355

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

Beds of Rivers

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-

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

and stationed at Landguard Fort

On the Measurement of Timber

409

418

On the Theory of parallel Lines in Geometry

On the Autumnal Flowering of the Narcissus

423

426

An Account of a General Survey of the Heavens undertaken at

the Konigsberg Observatory.

427

Some Experiments and Researches on the Saline Contents of Sea-

Water, undertaken with a view to correct and improve its Che-

mical Analysis

434

On the visible Solar and Lunar Eclipses which will happen in

the Year 1823

440

Some Remarks on Urinary Calculi, and their Chemical Exami-

nation

445

Note of some Experiments on the Vapour of Sulphuric Ether 448

True apparent Right Ascension of Dr. MASKELYNE'S 36 Stars

for every Day in the Year 1823, at the Time of passing the

Meridian of Greenwich

449

Mr. P. TAYLOR on the Expansive Force of Steam at different
Temperatures

Notices respecting New Books.

Proceedings of Learned Societies

452

66, 135, 211, 319, 377, 454

67, 145, 229, 387, 459

Intelligence and Miscellaneous Articles 66, 147, 230, 321, 388,