Brooke, Mr, reply to his observations on the optical system of mine-
ralogy, 361.

Buckland, Professor, on the caves of Kirby Moorside, and the other
caves in England, 221.

C

Cagnard de la Tour on the effect of heat and pressure on fluids, 199.
Calculating engine, Mr Babbage's, 197, 397.

Carbonaceous bodies, on the fusion of, 402.

Carbonic acid gas condensed into a liquid, 382.

Carlsbad springs, 204.

Catalogue of variable stars, 220.

Caves at Kirby Moorside, 221.-in different parts of England, 225.
Celestial phenomena from July 1. to October 1. 1823, 184.-from Oc-
tober 1. 1823 to January 1. 1824, 387.

Celt, account of a very remarkable one of flint, belonging to James
Nairne, Esq. 152.

Chalk not found in Crete, 406.

Changeable stars, observations on, 219.

Chara vulgaris and hispida, on the phosphorescence of, 194.
Chess-board, on the knight's moves over it, 236.

Chords, sonorous, on their excellence, 395.

Chlorine condensed into a liquid, 384.

Chronometrical compass, Captain Scoresby's described, 54.

Circular sterns, observations on, 353.

Cold, severity of it in Holland, 196.

Comet of Encke rediscovered, 193, 391.

Compass, on an improved one, 397.

Composite system in crystallography described, 370.

Condensation of gases into liquids, 199, 381.

Corolla of plants, on the phenomena of, 237.

Cyanogen condensed into a liquid, 383.

D

Delambre, M. Le Chevalier, biographical notice of, 209.-list of his
different writings, 215.

Dick, Mr Thomas, his work entitled The Christian Philosopher an-
nounced, 412.

Diamond, on its formation, 165.-on the fusion of, 179.-on the ma-
trix of the Brazilian kind, 202.

Don, Mr David, on five new genera of plants, 259.

Dorpat, observatory of, 391.

Double stars, observations on, by MM. Struve and Amici, 334.

E

Earth-worms multiply by eggs, 409.

Eclipse of the moon, on the measurement of the progress of one with
a sextant, 57.

of the moon of the 23d July observed, 387.-eclipse of the
sun on the 7th February observed, 392.

Electricity, animal, 196.

on the production of, by pressure, 396.-on the development
of, by two pieces of the same metal, id ---elicited from the cat, 437
Electrical machine haprovei 503

Electrical Phenomena observed at sea, 35.

Electro-magnetic experiments made in the University of Utrecht, 167.

Elmo, St, on the fire of, 35.

Embryo, on the organs of the, in vascular plants, 270.

Encke's comet, rediscovery of, 193, 391,-new elements of, 391.
Entomology, progress of, in Sweden, 407.

Etching on glass by fluoric acid, 411.

Euchlorine-gas condensed into a liquid, 381.
Euler's letters to a German Princes, 205.

F

Faraday, Mr, on the condensation of gases into liquids, 198, 381.-on
hydrate of chlorine, 198.

Fleming, Dr, his gleanings of natural history on the coast of Scotland,

248.

Fluids, on two new ones in the cavities of minerals, 94, 400.-on the
effect of heat and pressure on certain ones, 199.

Foramen centrale discovered in reptiles, by Dr Knox, 358.
Frauenhofer, M., on the refraction and dispersive power of different
kinds of glass, 288.-on the lines which cross the spectrum, 296.

G

Gases condensed into liquids, 198.-on the condensation of them into
liquids, 381.

Gay Lussac, M., his reflections on volcanoes, 278.

Geognosy of Brazil, 200.-of Madeira and Porto Santo, 315.

Geology, comparative, of the south of France and Germany, 128.

Glass, on the refractive and dispersive powers of different kinds of

288.

Gmelin, Dr, on a black mineral from Candy in Ceylon, 384.

H

Hail shower, account of a remarkable one, 194.

Hamilton, Dr Francis, on a map by a native of Dawæ, 228.

Harvey, Mr G., on the slave population of North America, 63.-on
the formation of mists and the deposition of dew, 255.

Haussman, Professor, on the structure of the Appennines, 153.

Haiy, Abbé, his experiments on double refraction, 148.-his collec-
tion of minerals, 404.

Herbert, Lieut., on the heights of the peaks of the Himalaya, 312.
Hermelin, Baron, biographical notice of, 325.

Hindostan, population of the cities of, 206.

Himalaya Mountains, on the height of the snowy peaks of the, 312.
Hodgson, Captain, his journey to the source of the Jumna, 7.-on the
heights of the Himalaya, 312.

Hoppe, Dr, his tour to the Adriatic, &c., 82, 341.

Horse, on the defective vision of the, 393.

Hot-springs at Jumnotri, 18.

Hudson's Bay, geognostical structure of the country from it to the
Polar Sea, 372.

Hulls, Jonathan, description of his steam-boat, invented in 1736, 274.
Human fossil remains, 202.

Humboldt, M., on petrifactions, 20.

VOL. IX. NO. 18. oct. 1823.

Hydrale of chlorine, crystals of, 198.

I J

Innes, Mr George, on the celestial phenomena from July 1. 1823 to
January 1. 1824, 387.-on the eclipse of the moon in July 1823, id.
Insects of Lapland, 408.-synonymy of, id.-in amber, id.

Iron-wire, tenacity of, not altered by heat, 197.

Iron, malleable, immediately from the furnace, 404.

Innerleithen waters, analysis of, 200.

Jameson, Professor, on the formation of opal, woodstone and diamond,
163,

Jumna, journey to the source of the, 7.

K

Knight's moves over the chess-board, 236.

Knox, Dr, on the foramen centrale in reptiles, 358.-on the anatomy
of the ornithorynchus paradoxus, 377.-on the defective vision of
the horse, 393.

Leaf, on the fall of the, 237.

L

Lenz, Professor, his mineralogical works, 406.

Littlewort, Lieut. on an improved ship's compass, 397.

Livonia, mensuration of a degree in, 392.

Lunar-Tables, on the errors of the, from 1783 to 1821, 193.

M

Machinery, calculating, Mr Babbage's, 197, 397.

Madeira, on the geognosy of, 315.

Magnets, artificial method of making them by percussion, 45.

Magnetic-needle, tables of its variations, 243.

Magnetimeter, Captain Scoresby's described, 42.

Mahogany, artificial, 409.

Mammifera Scandinavian, 407.

Map by a native of Dawæ, described, 228.

Meteoric-stone of Epinal, 196.-of Wiborg, analysed, 333.

Miller, Mr, on the temperature of mines, 242.

Mines, on the temperature of, 242.

Minerals, on new fluids found in their cavities, 94, 400,

Mists, on the formation of, 255.

Moll, Professor, on electro-magnetic experiments made in the Univer-
sity of Utrecht, 167.—on the maximum density of water, 199.—on
the great cold in Holland, 196.

Mollusca, cephalated, on the shells of, 359.

Moveable Crystals in a cavity of quartz, 269.

Muriatic Acid condensed into a liquid, 384.

Murray, Mr John, on the fall of the leaf, and the corolla of plants,

237.

N

Natural History, gleanings of, on the coast of Scotland, 248.
Nitrous Oxide condensed into a liquid, 383.

Niordenskjold, M. on Sordawalite, a new mineral, 162.—on the compo
sition of some acrolites which fell near Wiborg, 333.

Observatory of Dorpat, 391.

Opal, speculations regarding its formation, 163.-Hornstone, on its for-
mation, 164.

Optical system of mineralogy defended, 361.

Ornithorynchus Paradoxus, on the anatomy of the, 377.

Ornithology, Swedish, 407.

Oscillation of sonorous chords, 395.

Palladium, experiments on, 404.

Paramatta, position of, 391.

P

Paranthine identical with Wernerite, 393.

Patents, list of, granted in Scotland, 208, 413.

Pearson, The Rev. Dr, his Introduction to Practical Astronomy, 392.
Pendulum Doubler of electricity, a new one described, 322,
Percussion, on the magnetism produced by it, 45.

Perkins, Mr, his new steam-engine described, 177.—his method of ap-
plying the new principle to old steam-engines, 177, 328.—on the
crystallisation of acetic acid by pressure, 401.—on the effects of
pressure on atmospheric air, 401.

Persulphate of iron and ammonia, 401.

Phillips, Mr R., his analysis of Uranite, 199.

Phosphorescence of the chara vulgaris and hispida, 194.

Petrifactions, observations on, 20.

Plants, on five new genera of, 259.

Plumbago, on the fusion of, 179.

Polarisation of sound, 394.

Population of the cities of Hindostan, 206.- of the United States, 207.

of Rome in 1821 and 1822, 207.

Porto Santo, on the geognosy of, 315.

Preparations, method of preserving, 205.

Pristanowsky's work on Tuscany, 200.

Proceedings of the Royal Society of Edinburgh, 185.-of the Werne-
rian Natural History Society, 187, 389.—of the Society of Arts
for Scotland, 189.

Rain, quantity of, in America, 397.

R

Refraction, double, account of discoveries respecting it, 148.

Refractive and dispersive power of different kinds of glass, 288.

Reptiles, foramen centrale in the eyes of, discovered by Dr Knox, 358
Richardson, Dr, on the geognostical structure of the country from
Hudson's Bay to the Polar Sea, 372.

Ripel's work on the structure of the Alps, 200.
Rome, population of, for 1821 and 1822, 207.

Ronald's pendulum doubler of electricity, 322.-his improvement o
the electrical machine, 395.

Royal Society of Edinburgh, proceedings of, 185.

Rusconi, Dr, on the aquatic salamander, 113.

S

Salamander, aquatic, Dr Rusconi's observations on the, 112.
Salt-Springs, probable origin of, 409.

Science, connection of, with religion, 412.

Scoresby, Capt., his Magnetimeter and Chronometrical Compass de-
scribed, 41.

Seebeck, Professor, on thermo-electricity, 167.

Sharks and rays, 408.

Silliman, Prof., on the fusion of plumbago, anthracite, and the diamond,
179, 402.

Slave Population, on the increase of, in North America, 63.

Snow, fall of remarkable balls of, at Brunswick, 397.

Society of Arts for Scotland, proceedings of, 189.

Sound, on the polarisation of, 394.

Sordawalite, description and analysis of, 161.

Steam-Boat, description of the one invented by Jonathan Hulls, 274.
Steam-Engine, description of Mr Perkins' new one, 172.-application
of his principle to engines of the old construction, 177, 328.
Steel, method of cutting it by soft iron, 409.
Sterns, circular, observations on, 353.
Strom, M., on a new mineral called Achmite, 55.
Struve, M., his observations on double stars, 334.
Sulphate of iron and alumina found native, 403.
Sulphuretted hydrogen condensed into a liquid, 382.
Sulphurous acid gas condensed into a liquid, 381.
Swedish journal, 204.

T

Table of the heights of the snowy peaks of the Himalaya, 314.
Tanning, important improvement in, 411.

Thermo-electrical experiments, 167.

Thermometers, on the effect of atmospheric pressure on the bulbs of,

398.

Thunder-Storms, on the re-appearance of, 397.

Titanium, metallic, found in cubes, 403.

Tortoises, fossil, 408.

Typhon of the Chinese Seas, 205.

Variation of the magnetic needle, Tables of the, 243.

Vettie's Giel, a scene in Norway, described, 299.

Vision of the horse defective, 393.

Volcanic eruption, destructive one in Java, 410.

Volcano of barren islands, 205.

Volcanoes, Guy Lussac's reflections on, 278.

Voyage, M. Kotzebue's new one, 412.

Water, on the maximum density of, 199.

Wernerian Society, proceedings of the, 187, 389.-memoirs of the, 202.

Wernerite identical with Paranthine, 393.

Wheatstone, Mr, on the polarisation of sound, 394.

Whirlwind at Scarborough described, 398.

Y

Yule, Dr, on the organs of the embryo, 270.

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