destruction described. This means had, at the end of the summer of 1822, reduced the glacier, which originally covered the river for a length of 1350 feet, to an extent of 498 feet only. The cold-winter of 1822-3 and the following spring, increased the glacier to 924 feet, and this new part was excessively rugged and dangerous to work upon, and continually exposed to masses falling from the upper glacier. It was requisite, however, that this should be first destroyed, which was done at the risk of many serious accidents by currents of water as before, during the summer of 1823, and such advantage taken of the rest of that cold short summer as to diminish the whole glacier to 252 feet only. Thus, notwithstanding the accessions which it must have received during the last winter, there is little doubt but that it will be entirely removed during the present summer, and then the course of the river being open, it will generally remove all the avalanches that may fall at any future period; or if a disastrous year like that of 1816 gives rise to the formation of a new glacier, the means for its removal are known, and may be practised before the formation of another lake can again destroy the country.

VOL. XVII.

INDEX.

Acetate of lime, phosphorescence of, 163. Of morphia, how.
detected in cases of poisoning, 168-170. Of copper, 383-383
Acids, succinic and benzoic, facts relative to the history of, 141.
Preparation of sulphurous acid gas, 163, 164. Acid tartaro-
sulphate of potash, 171. Conversion of Gallic acid into ulmin,
174. Analysis of sodous acid, 381, 382. Liquefaction of
sulphureous acid, 391. Action of the meconic acid on the
animal economy, 393, 394

Algol, table of the recurrence of the smallest light of, 184, 185
Analyses of scientific books, 105—130, 335–359. Of cafeine,
174. Of sodous acid, 381, 382

Arfwedson, (M.) his mode of procuring the pure oxide of uranium,
382. And uranium pyrophori, 383

Arsenic, detection of, in cases of poisoning, 165

Astronomical and Nautical Collections, 85-104, 295–334
Astronomical Phenomena, for April, May, and June, 1824, 77-84
And for July, August, and September, 238-244.

Atmosphere, a finite and exact expression for the refraction of one,
nearly resembling that of the earth, 255, 256

Atomic Weights, table of, 383

Badnall, (Mr.) improvement of, in dyeing with Prussian blue, 167.
Bakewell, (Mr.) theory of, to account for the production of sound
by opening a subterraneous gallery, 152, Table of vegetation
at different heights, 176

Barlow, (Peter, Esq.) experiments and observations by, on the
daily variation of the horizontal and dipping needles, under a
reduced directive power, 128

Barometer, horary oscillations of, 189-197, Remarks on the ba
rometer, 345-347. On the formation of mercurial vapourin, 380
Becquerel, (M.) account of the electrical effects produced at the >
moment of the combination of the metals and alkalis, with the
acids, 136-138. Observations of, on the electro-motive actions
produced by the contact of metals with liquids, 374, 375. His
test of the alteration of solutions by contact with air, 379
Bell (Charles, Esq.) on the motions of the eye, in illustration of
the uses of the muscles and nerves of the orbit, 123, 124, 127
Berthier, (M.) on the preparation of sulphuretted hydrogen, 164.
Of the saturated hydro-sulphuret of potash or soda, 165. And
of the pure oxide of nickel, 166,

Berzelius (Professor) letter from, 273, 274

Bevan, (Mr.) experiments by, on the adhesion of nails, in different
kinds of wood, 360

Blainville (M.) sur les Ichthyolites, analysis of, with strictures on
his errors and the imperfections of his work, 105-121
Blowpipe, self-acting, described, 236, 237

Boussingault and Rivero, (MM.) Memoir of, on the milk of the
Cow tree, 142. On the hot springs of the Cordilleras, 143
Brande, (W. T., Esq.) prospectus of his course of lectures on elec-
tricity, 282-284. And on vegetable chemistry, 288-289
Brard, (M.) on the action of frost on building materials, 148, 149
Brinkley (Dr.) remarks on the parallax of a Lyræ, 264, 265
Brisbane, (Sir Thomas) account of experiments made by, with an
invariable pendulum, at New South Wales, 128

British Channel, observations on the soundings in, 245-247
Cafeine, composition of, 173, 174

Caoutchouc, observations on the preparation of, 364

Capillary Action of fissures, &c., remarks on, 151, 152

Carrara Marble, natural changes in, 178

Chalk, observations on the burning of, 361-363

Chalybeate Water, artificial, notice of, 386

....

Cheltenham Water, existence of nitrate, and a salt of potash, dis-

covered in, 178, 179

Chemical Science, intelligence in, 153-175, 369-386

Chevreul, (M.) observations of, on the action of bodies on the
organs of taste, 392, 393

Chili, account of the earthquake in, in Nov., 1822, 38-46

Chiswick, account of an overflowing well at, 70-74

Christie, (Samuel Hunter, Esq.) observations on the diúrnal varia-L
tions of the horizontal needle, when under the influence of
magnets, 128, 129. And on the effects of temperature on the
intensity of magnetic forces, 279

Chronometers, influence of magnetism on, 197-202, 365-367
Climate of London, meteorological remarks on, 340-345
Coal Strata, products of the combustion of certain, 180

Coindet, (C. W.) account by, of the injection of a solution of opium
into the veins of an hysterical patient, 145, 146

Collyer, (Charles, Esq.) observations by, on univalves, 272, 273
Comets, remarks on the catalogue of the orbits of, that have hitherto
been computed, 85-96. Remarks on the periodical comet (86
Olb.).96-99. Elements of the comet of 1823, 4, by various
computers, 104

Conchology, observations on the present state of, 29, 30
Condensation of Gases, experiments on, 123, 124, 125.

Conductors (fluid), on the motions produced in, when transmitting
the electric current, 256-259

Cooper (Mr.) analysis by, of the ancient ruby-glass, 165. Descrip-
tion of his lamp-furnace for the analysis of organic bodies, 232

Copper, experiments on the acetates of, 383-385
Copper-sheathing of ships, how prevented from corrosion, 253
Cordilleras, on the hot-springs of, 143. Account of the different
masses of iron which have been found n the eastern Cordillera
of the Andes, 394, 395

Cow-Tree, memoir on the milk of, 142, 143

Crotch (Dr.) syllabus of his course of lectures on music, 287
Croup, sulphate of copper an excellent remedy in, 181

Crystal, unequal dilation of, in different directions, 157. Differ-
ence of crystalline forms of the same substance, ibid., 158
Crystallization, supposed effect of magnetism on, 158. Of the
sub-carbonate of potash, 167

Dahline, discovery of, in the Jerusalem artichoke, 385

Daniell (J. F., Esq.) observations and experiments on evapora
tion, 46-61. On the horary oscillations of the barometer,
189. Review of his Metereological Essays and Observations, 335
Davy (Sir Humphrey) on a new phenomenon of electro-magnetism,
122. On the application of liquids, formed by the condensa
tion of gases, as mechanical agents, 125, 126. On the mode
of preventing the corrosion of copper-sheeting by sea-water, in
ships, 253-279-280-

Davy (Dr. John) on air found in the pleura, in a case of pneu
mato-thorax, 130, 263

Debret (M.) experiments of, on the comparative advantage of coke-
and wood, as fuel, 361

Dew, observations on some phenomena relating to the formation
of, on metallic surfaces, 1-12

Dillwyn (L. W.) observation of, on fossil shells, 129, 267
Dipping-needle, general results of, 104. Experiments and ob-
servations on the daily variation of the horizontal and dipping-
needles, under a reduced directive power, 128, 129.

Dobereiner (M.) on the capillary action of fissures, 151, 152. No-
tice of his instantaneous light apparatus, 378, 379

Dulong and Thenard (MM.) Experiments on the property which
some metals possess, of facilitating the combination of elastic
fluids, 132, 133

Earthquake in Chili, account of, 38-46

Electrical Machines, variation in the construction of, 161. Account
of an electrical arrangement, produced with different charcoals
and one conducting fluid, 174, 175.

Electricity, connexion of phosphorescence with, 163. Electricity,
on the separation of parts, 162. Electric light, 162. Observa-
tions on a reciprocity of insulating and conducting action, which
the incandescent platina of Davy exerts on the two electricities,
369-372. Measurement of the conductibility of bodies for
electricity, 376. Destruction of positive and negative electricity,
377 Electricity produced by congelation of water, ibid. On

B