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X. A Monograph of the Genus Tachyphonus ; a Group of Birds

belonging to the Tanagræ of Linnæus. By William Swain-

SON, Esq., F.R. and L.S., &c. . . . . . 60

XI. Supplement to a Paper on the Vibrations of Heavy Bodies, in

the Fifteenth Volume of this Journal. By Davies GILBERT,

Esq., M.P., Treas. R. S., &c. . . . . . 69

XII. Correction of an Error in the “Meteorological Essays." By

J. F. DANIELL, F.R.S. . . . . . . .

XIII. On the Barometer. By J. F. Daniell, F.R.S. . .


i. A Method of Computing the Sun's Horizontal Parallax from

Observations of the Transits of Venus. By T. HENDERSON, Esq. 94

ii. Remarks on the Discordances observed between the Lunar

Observations at Greenwich and Paris. By T. Henderson, Esq. 96

iii. The Latitude of Greenwich, as computed by Professor Bessel 98

iv. Bessel's latest Fundamental Catalogue of Stars, deduced

from his Observations in the last five years. Schum. Nach. No. 78. 99

v. Abstract of Captain SABINE's Experiments to determine the

Figure of the Earth. ' Printed at the expense of the Board of Longi-

tude, 4to. London, 1825 . . . . . . . 100

vi. Extract from a Letter addressed by Professor Bessel to Pro-

fessor SCHUMACHER, relating to the Greenwich Observations. 108

XV. Analysis of Scientific Books.

I. An Attempt to establish the First Principles of Chemistry by

Experiment.' By THOMAS THOMSON, M.D. Regius Professor of

Chemistry in the University of Glasgow, F.R.S. Lond. and Edin.,

&c. &c. ..

. .


. . 113

II. An Account of Experiments to determine the Figure of the

Earth by means of the Pendulum vibrating Seconds in different Lati-

tudes ; and on various other Subjects of Philosophical Inquiry. By.

Captain Edward SABINE, F.R.S. &c. .

. . 141

III. Remarks on Professor Spohn's Essay de Lingua et Literis

Veterum Ægyptiorum, edited by Professor Seyffarth



Miscellaneous INTELLIGENCE.

1. MECHANICAL Science.

1. Dr. Black's Sensible Balance. 2. Tenacity of Iron, as ap-
plicable' to Chain Bridges. 3. Moving Rocks of Salisbury. 4.
Etruscan Vases. 5. On the Repulsion exerted by heated Bodies at
sensible Distances. 6. Polarized State of Halo Light. 7. Nature
of Shooting Stars seen during Day-time. 3. Astronomical Prize
Question ; Natural Philosopby .. . . . . 161


1. On the dry Voltaic Piles of M. Zamboni. 2. New Galvano-

meter. 3. On the Length of the Electric Flash producing Light-

ning. 4. On the Existence of Iodine in a Mineral Substance,

5. Selenium in the Sulphur of the Lipari Islands. 6. Natural

Sources of Carbonic Acid Gas. 7. Process for the Detection

of Phosphate of Lime. 8. Metallic Titanium in Iron Furnaces.

9. M. Rose on the Separation of Titanic Acid from Oxide -

of Iron. 10. M. Wohler on Tungsten, and its Combinations.

11. Composition of Ancient Glass. 12. Action of Lime upon Al-

cohol. 13. Melaina, or the Black Principle of Sepia. 14. Ana-

lysis of the Solanum Pseudo-quina . . . . . 169

III. Natural History.

1. Meteoric Appearance on Ben-Lomond; Ascent of Vapour.
2. Description of an Earthquake. 3. Extraordinary Rise of the
Rio de la Plata. 4. Fall of a Meteoric Stone at Nantgemory, Mary-
land. 5. Composition of Aërolites. 6. Flexible Marble of Berk-
shire County, U. S. 7. Extraordinary Minerals discovered at

Warwick, Orange County, N. Y. 8. Globules of Water in Ame-

thyst. 9. Recent Formation of Brown Hematitic Iron Ore. 10. On

the Habits of Beavers. 11. Tenacity of Life in Larvæ. 12. Argo-

nauta Argo. 13. Recent Vegetation of Ancient Beans. 14. On the

Origin of Ergot. 15. Action of Poisons upon the Vegetable King-

dom. 16. On the Contents of the Digestive Canal in the Fætus of

Vertebral Animals. 17. Remedy for Effects produced by Inhaled

Chlorine. 18. Employment of Caustic to destroy the Variolous

Eruption. 19. Preservation of Anatomical Preparations. 20. Phy-
siological Prize Question. 21. Salt on the Shore of the Severn 152

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A complete General Index to the first Twenty Volumes of this

Journal is preparing for publication.

· An anonymous Communication from Portsmouth cannot be

“ A Chemical Student" will find the difficulty to which he
alludes fully explained in our Review of Dr. Thomson's “ At.
tempt,” &c.

Communications have reached us from Dr. Wilson, Dr. Mac
Culloch, Mr. H. Burns, Mr. Swainson, and Mr. Wells : these
have of necessity been deferred.

We are quite willing to listen to all reasonable suggestions
respecting the improvement of this Journal, but the complaints
of a Mechanic" are without foundation: we must remind him,
that “ ex nihilo, nihil fit." Had we blazoned forth, as did some
of our contemporaries, either of the schemes to which our friend
alludes, we should have deservedly incurred the blame of hasti-
ness and credulity.

The reports alluded to by F. R. S. are false, as relating to
the Royal Institution, and very far from correct as concerning
the Royal Society: upon such grounds, we decline publishing his
letter: to shew that no other feeling prevails, we shall be happy
to insert it in our ensuing number, provided he will allow us to
attach a commentary of our own.

The review of a work inquired after by our correspondent at
Warwick will probably appear in our January Number.

We are apprehensive that the communication with which we
have been favoured by “ a Regular Reader” respecting the
manufacture of chloride of lime, would not be intelligible with-
out a drawing

Mr. BRANDE and Mr. FARADAY will commence the
Lectures and Demonstrations in Chemistry in the Laboratory
of the Royal Institution, on Tuesday Morning, the Ilth of
October, at nine o'clock precisely.

A Prospectus may be obtained at the Royal Institution.
(See page 203.)

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