Chrysotype, a new photographic pro-
cess, 394, 397, 398.
Chorion, the, 76, 139.

formed of cells arising in the
oviduct, 225.

on its formation out of cells,

279.
Chronic diseases, application of iodide
of potassium to the cure of, 473.
Claudet (A.), new mode of preparation

of the Daguerréotype plates, 315.
Ciliary processes, the elements of the,
compared with corpuscles of the
blood, 324.

Circle, computation of the ratio of the
diameter to the circumference to
208 places of decimals, 302.
Circulation of the blood in the Myria-
poda and Arachnida, 458.
Climate of London, on a cycle of
eighteen years in the mean annual
height of the barometer in the, and
on a constant variation of the baro-
metrical mean according to the
moon's declination, 292.

—, on the prevailing winds, mean
temperature and depth of rain in
the, 300.

Clock, description of an escapement
for an astronomical, 221.

electro-magnetic, 249.

Clouds, stationary, on, 33.
Coal and fossil wood, imbedded in ig-
neous rocks, 299.

Coggan's (J.) self-registering thermo-
meter and barometer, 72.
Colebrooke (H. T.), notice of the life
and works of, 10.

Colours of mixed plates, on, 33.

-, on Nobili's plate of, 195.
vegetable, action of the rays of
the solar spectrum on, 393, 397.

of flowers, of the, in general
under the action of the spectrum,
393.

Comet of 1843, 450, 456.

Compass, experiments for discovering

a correction for its deviation in iron-
built ships, 141.

Conchoidal surface, geometrical and
mechanical elements of a, 81.
Conduction, electrolytic, 50.

or conductive discharge, 50.
Conductors and insulators, analogy of,
50.

Conferva crispa of Dillwyn, 238.
Conferva fluviatilis of Linnæus, 238.

Constant battery, Daniell's, 23.

-, account of the effects of a large,
147.
Constantinople, results of meteorologi-
cal observations at, 293.
Contact theory of voltaic electricity,
200; chemical theory, 201.
Convection, or carrying discharge, 56.
Cooper (Sir A. P.), biographical notice
of, 344.

Cooper (J.T.), description of a hydro-
pneumatic baroscope, 126.
Cooper (J. S.) on the visibility of cer-
tain rays beyond the ordinary red
rays of the solar spectrum, 146.
Copley Medals, awarded to M. Bec-
querel, 22; to J. F. Daniell, Esq.,
23.

awarded to Prof. Gauss, 99; to
Prof. Faraday, 100.

awarded to Prof. Liebig and to
M. Sturm, 255.

awarded to Dr. G. S. Ohm, 336.
awarded to Prof. MacCullagh,

419.
Corallidæ, on the organic tissues in
the bony structure of the, 383.
Copper, on the reduction of, 447.
Cordilleras, heights of the principal
points of, 196.

Cornea, the, a non-vascular animal
tissue, 310.

Cornwall, electric conditions of the

rocks and metalliferous veins of
mines in, 317.

Corpus luteum, elements of the, de-
rived from corpuscles of the blood,

324.

Council and Officers of the Royal So-
ciety: for 1837-38, 28; for 1838-
39, 105; for 1839-40, 184; for
1840-41, 272; for 1841-42, 355;
for 1842-43, 423.

Council of the Royal Society, their
statement relative to Mr. Panizzi's
pamphlet, 18.

-, report of their proceedings, 21,
99, 332.

-, report on the state of the Soci-
ety's library, 333.

Crozier (Capt. T. B. M.), meteorolo-
gical observations taken on board
H.M.S. Terror, 293, 374.
Crustacea, on the organ of hearing in,
471.

Crystalline lens, a non-vascular ani-
mal tissue, 310.

Crystallography, on the theory of, 116.
Curvature of surfaces, on, 112.
Cuvier (M. F.), biographical notice of,

98.

Cyanotype, a photographic process,
397, 398.

Daguerréotype plates, new mode of
preparation of, 315.

Dalrymple (John) on the nerves of
the uterus, 323.

Dalton (Dr.) on the phosphates, 162.
on the arseniates, 162.

a portrait of, presented to the
Royal Society, 333.
Daniell (Prof.), a Copley medal award-
ed to, 23.

on voltaic combinations, with re-
ference to the mutual relations of
the generating and conducting sur-
faces, 43.

account of the effects of a large
constant battery, 147.

on the electrolysis of secondary
compounds, 153, 231.

on voltaic combinations, 43, 147,
383, 384.

a Royal medal awarded to, 422.
Darwin (C.) on the parallel roads of
Glen Roy, 122, 127.

Davidson (John), notice of the late,

Indies, on the North coast of Brazil
and North America, 4.
Disc, the, of Prof. Baer, 75.
Discharge (electric), conductive, 50;
disruptive, 50, 51, 55; electrolytic,
50; difference of, at the positive and
negative surface of conductors, 54;
spark, 51; brush, 52, 55; glow, 55;
dark, 56; convective, 56.

Discs, primitive, in blood-corpuscles
exhibit an inherent contractile power,
324.

Dollond (G.), a portrait of, in the pos-
session of the Royal Society, 402.
Donation Fund, some observations
to call attention to the, 372.
Drach (S. A.) on the diurnal tempe-
rature of the earth's surface, 377,
444.

Dragon's blood, resin of, 136.
Drawing, photogenic, 120, 124.
Dulong (P. L.), biographical notice of,

97.

Dumfries, account of the hurricane of
January 7, 1839, 123.

Dunlop (J.), observations of the dip
and intensity made at sea, between
England and Australia, 212.

Earle (H.), notice of the late, 95.
Earth, on the diurnal temperature of
the, 377, 444.

-, on the figure of the, 289.

on the state of the interior of
the, 83, 115, 129, 367.
Earthquake in one of the Scilly Islands,
122.

Earthy and alkaline bodies, on the

formation of, with reference to their
presence in plants, 131.

Eldon (Earl of), notice of the late, 94.
Electrical induction, specific, Prof.

Faraday's discovery of, 37, 100.
Electric charge, penetration of, within
a dielectric, 39.

conditions of the rocks and me-
talliferous veins of mines in Corn-
wall, 317.

current, nature of, 56; trans-
verse force of, 56.

currents, Dr. Ohm's researches
into the laws of, 336.

force of the Gymnotus, on the
character and direction of the, 111.
force, experimental relation of,
to nervous force, 112.

force or forces, nature of, 77;

relation of the electric and magnetic
forces, 78.
Electric inductive capacity, specific, of
certain substances, 40, 392.
Electricity evolved by the friction of
water and steam against other bodies,

437.

M. Becquerel's memoirs on, 22.
-, on the elementary laws of, 156.
on the odour accompanying,

226.
--, Prof. Faraday's researches in,
37, 49, 54, 77, 111, 200, 213, 437.

voltaic, contact theory of, 200;
chemical theory of, 201.; on the
production of heat by, 280.
Electro-chemical equivalents, on, 232.
Electrolysis of secondary compounds,
153, 231.

Electrolytic discharge, 50.
Electro-magnetic clock, 249.
Electrometer, 38.

hydrostatic, 156.

micrometer, 193.

Electro-nitrogurets, on, 286.
Elemi resin, 241.

Ellipse and the hyperbola, method of
proving the three leading properties
of the, 443.

, spherical, on the rectification
and quadrature of the, 387.
Ellipsoids of equilibrium, on, 34.
Embryo, first rudiments of the, not
two halves, 283.

Embryology, researches in, 73, 136,
222, 279.

Emys Benstedi, a remarkable fossil
turtle, 305.

Epithelium tables, cells and cylinders,
compared with corpuscles of the
blood, 324.

Equations, numerical, new method of
solving, 300.

Equivalents, chemical, on, 119, 123.
Erratic boulders of Lochaber, 128.
Erythrine, chemical examination of,

233.

Erythroleic acid, chemical examination
of, 233.
Erythrolein, 234.

Erythryline, chemical examination of,
233.

Erythrolitmine, 234.

Escapement for an astronomical clock,
description of an, 221.
Eudiometry, application of the gas
battery to, 464.

Euphorbium resin, 241.

Evans (Dr. W. J.) on the general and
minute structure of the spleen, 456,
457.

Exley (T.) on a new theory of physics,
325.

Eye, on the structure and mode of ac-
tion of the iris, 439.

on the cure of congenital blind-
ness, 303.

-, on the anatomy and physiology
of certain structures in the orbit, 311.

Factorial expressions, on, 456.
Falkland Islands, meteorological jour-
nal kept at, 330.

Fallopian tube of the rabbit, ova found
in the, 222.

Faraday (Prof.), researches in electri-
city (11th Series), 37; (12th Series),
47, 49; (13th Series), 53, 54; (14th
Series), 77; (15th Series), 111; (16th
Series), 200; (17th Series), 213;
(18th Series), 437.

-, a Copley medal awarded to, for
his discovery of specific electrical in-
duction, 100.

chemical account of the Cold
Bokkeveld meteoric stone, 134.
Farnborough (Lord), notice of the late,
94.

Farquharson (Rev. Dr. J.), on a geo-
metrical measurement of the height
of the aurora borealis, 162.

on the localities affected by hoar-
frost, 293, 294.

on ground-gru, or ice formed at
the bottom of running water, 295.

-, on a remarkable appearance of
the aurora borealis below the clouds,
382.

Farre (A.) on the organ of hearing in
Crustacea, 471.

Fecundation, changes in the ovarian
ovum preparatory to, 222; point of,
222; changes in the ovum immedi-
ately after, 223.

Fellows of the Royal Society admitted,
4, 85, 168, 251, 340, 400.

table showing their number in
1837, 32; in 1838, 109; in 1839,
251; in 1840, 277; in 1841, 360;
in 1842, 428.

-, Foreign Members admitted, 5,
168, 252, 400.

Fellows of the Society, deceased, list
of, 4, 85, 167, 251, 340, 399.

Fermat, on a theorem of, 290.
Fermentation, vinous, 150, 165.
Fibre, on, 362, 384, 431.

Fibres, decussation of, at the junction
of the medulla spinalis with the
medulla oblongata, 71.

Fielding (Dr. G. H.) on the epidemic
influenza at Hull, 381.

Ferrall (J. M.) on the anatomy and
physiology of certain structures in
the orbit, 311.

Figure of equilibrium, on determining
the, 158.

of the earth, on the, 289.
Fish, cartilaginous, on the male organs
of, 129.

Fisher (Rev. G.), magnetical observa-
tions of Capt. Sir E. Home, Bart.,
reduced by, 4.

Fluid, on the conditions of equilibrium
of an incompressible, 157.
Fogs, on the formation of low, 33.
Forbes (Prof. J. D.), the Rumford
medal awarded to, for his discoveries
in the polarization and double re-
fraction of heat, 104.

on the transparency of the at-
mosphere and the law of extinction
of the solar rays in passing through
it, 389.

Fossil remains of the Iguanodon and
Hylæosaurus, 290.

remains of turtles, 305.

wood and coal imbedded in ig-
neous rocks, 299.
Fossiparous generation, on, 441.
Fowler's (T.) calculating machine, 243.
Frankincense, consists of two acid
resins, 163.

Franz (Dr. J. C. A.) on the case of
a gentleman born blind, and success-
fully operated upon in the 18th year
of his age, 303.

Friction of water and steam against
other bodies, on the electricityevolved
by, 437.

Frodsham (W. J.) on the vibration of
the pendulum, 78.

Galbanum, resin of, 241.
Gambodic acids, 163.
Gamboge, resin of, 163; chemical for-

mula of, 163.

Ganglia, nervous, of the uterus, 321,
395.

Garden (P.), account of the hurricane
at Dumfries, Jan. 7, 1839, 123.

vesicle and spot, changes in, pre-
paratory to fecundation, 222; after
fecundation, 223; not a nucleus but
a parent cell, 223.

in birds, batrachian reptiles and
osseous fishes, 242.

Gibraltar, wind table from observations
taken at, 432.

Gilbert (Davies), biographical notice
of, 256.

Gillies (Lieut.) on the variation of the
magnetic needle, 437.

Glen Roy, on the parallel roads of, 127.
Glow, electric, 55.

Golconda, on the diamond mines of,
280.

Gold, on the reduction of, 447.
Graafian vesicle, 74; of mammals,

how related to the calyx of birds,
amphibia and fishes, 74; the order
of formation of the more permanent
parts of the ovum and the Graafian
vesicle in mammalia, 76.
Graham (Prof. Thomas), a Royal
medal awarded to, for his inquiries
respecting the constitution of salts;
of oxalates, &c., 102.

Ground-gru, or ice formed at the bot-
tom of running water, 295.
Grove (W. R.) on some electro-nitro-
gurets, 286.

on the gas voltaic battery, 463.
Grover (Capt. J.), notice of the comet
of 1843, 456.
Guaiacum, resin of, 163.

action of light on a solution of
this resin spread on paper, 393.
Guernsey, meteorological journal kept
at, 466.

Guiana, meteorological observations
taken at Georgetown, 467.
Gulliver (G.) on suppuration, 67.
— on the blood-corpuscles of certain
species of the genus Cervus, 199.
Gymnotus, character and direction of
the electric force of, 111.

Hæmadynamometer of Poiseuille, 285.
Haggard (W. D.), experiments made

on a piece of Peña silver, 119.
Hake (Dr.) on the structure and func-
tions of the spleen, 164.
Hall (C. R.) on the structure and
mode of action of the iris, 439.
Halliwell (J. O.), a catalogue of the
manuscripts in the library of the
Royal Society made by, 253, 334.
Hanson (Prof.) on a new method of
computing the perturbations of the
planets, 435.

Harding (Col. G. J.), wind table from

observations taken at Gibraltar,432.
Hardy (P.) on a new and general no-
tation applicable to the doctrine of
life contingencies, 198.
Hargreave (C. J.) on the calculation
of attractions, and the figure of the
earth, 289.

Harris (W. S.) on the elementary laws
of electricity, 156.

on the specific inductive capacities
of certain electric substances, 392.
Hearing, the organ of, in Crustacea,
471.

Heat, on the production of, by voltaic
electricity, 280.

--, Prof. Forbes's discoveries in the
polarization and double refraction
of, 104.

Hennell (H.), notice of the late, 419.
Henning (Capt. A.), meteorological
register kept during a voyage from
London to Calcutta and back to
London, 329.

Henwood (W. J.) on the electric con-
ditions of the rocks and metallife-
rous veins (lodes) of mines in Corn-
wall, 317.

Herschel (Sir J. F. W.) on the art of
photography, 131.

on the chemical action of the
solar spectrum on preparations of
silver, &c., 203, 205.

a Royal medal awarded to, 255.
on the action of the rays of the
solar spectrum on vegetable colours,
393, 397.

on improvements in photogra-
phic processes, 398.

on an extraordinary luminous
appearance [the Great Comet] in
the heavens on the 17th of March,
1843, 450.

Heygate (Dr. J.) on the nature and
properties of iodide of potassium,
and its applicability to the cure of
chronic diseases, 473.

Hibbert, (G.), notice of the late, 93.
Hilton (J.) on the decussation of fibres
at the junction of the medulla spi-
nalis with the medulla oblongata, 71.
Hoar-frost, on the localities affected
by, 294.

Hoare (Sir R. C.), notice of the late,

93.

Hodgkinson (Eaton) on the strength
of pillars of cast iron and other ma-
terials, 227.

-, Royal medal awarded to, 338.
Hogg (J.) on the action of light upon
the colour of the river sponge, 72.
Holland (Lord), notice of the late, 264.
Home (Capt. Sir J. E., Bart), magnetic

observations made in the West In-
dies, on the Coasts of Brazil and
North America, 4.

Hoofs, the, one of a class of non-vas-
cular animal tissues, 310.
Hopkins (W.) on the state of the in-
terior of the earth, 83.

on the phenomena of precession
and nutation, assuming the fluidity
of the interior of the earth, 115, 129,
367.

Horse, on the markings of the eel-
back dun variety of, 163.

Hoskins (Dr. S. E.) on the decompo-
sition and disintegration of phos-
phatic vesical calculi, 442.

meteorological journal kept at
Guernsey, 466.