Bunsen (Prof.) on the measurement
of the chemical action of light, 521.
Calcium, on the electric conducting
power of, 86.

Caldwell (M.) on gaïdic acid, 185.
Cambridge Philosophical Society,
proceedings of the, 215.

Carbonates of the earths and metals,
on the artificial formation of the
hydrated, 388.

Carius (M.) on the absorption of
various gases in alcohol, 119.
Carpenter (W. B.) on the Foramini-
fera, 384.

Catalytic phænomena, on the con-
nexion of, with allotropy, 248, 440.
Cayley (A.) on the porism of the in-
and-circumscribed triangle, 19; on
caustics, 75; on the theory of the
analytical forms called trees, 172;
on a problem in the partition of
numbers, 245; on the summation
of a certain factorial expression,
419; on a theorem relating to
the rectangular hyperbola, 423;
analytical solution of the problem
of tactions, 507.

Challis (Rev. J.) on the problem of
three bodies, 133.
Chemical notices from foreign jour-
nals, 118, 183, 269, 497.
Chowne (Dr. W. D.) on the velocities

of currents of air in vertical tubes,
291.

Chromium and ammonia, on certain

double compounds of, 191.
Church (A. H.) on parabenzole, 415.
Cinnamic acid, on the artificial pro-
duction of, 183.

Clarke (Rev. W. B.) on the occurrence
of volcanic bombs in Australasia,
147..
Claudet (A.) on various phænomena

of refraction through semi-lenses
or prisms, producing anomalies in
the illusion of stereoscopic images,
71.

Cleghorn (J.) on the formation of
rock-basins, 213.

Coan (Rev. T.) on volcanic eruptions
in Hawaii, 146.

Cockle (J.) on the theory of equa-
tions of the fifth degree, 355.
Colour-blindness, observations on,

282.

Comets, on the density and the mass

of, 301; on the absorption of light
in traversing, 471.

Copper-mines of Namaqualand, ac-
count of the, 214.

Corenwinder (M.) on the production

of carbonic acid in the soil, 502.
Crustaceans, on some fossil, 213, 465.
Cryolite, on the preparation of arti-
ficial, 272.

Crystal, on the anharmonic ratio of

radii normal to four faces of a, 96.
Crystalline compounds formed by
slow actions, observations on, 300.
Crystallography, on the application of
elementary geometry to, 345.
Cyanometer, on a new, 389.
Damour (A.) on the artificial forma-
tion of the hydrated carbonates of
the earths and metals, 388; on the
examination and analysis of eudi-
alite and eukolite, 391.
Davoust (M.) on a new barometer,
468.

Day (A.) on the theory of parallels,
156.

Debus (Dr. H.) on the action of nitric
acid on alcohol at common tempe-
ratures, 39, 66; on the action of
nitric acid on glycerine, 537.
De la Rue (W.) on the chemical ex-
amination of Burmese naphtha, 513.
Deville (St.-Claire) on the produc-
tion of high temperatures, 124; on
the various forms of silicon, 269;
on the preparation of artificial cry-
olite, 272; on boron, 273.
Diamond (H. W.) on some applica-
tions of photography, 133.
Dichobune ovina, 385.

Dichodon cuspidatus, 209. -
Diffraction spectrum, on the, 153.
Donaldson (Dr.) on the structure of
the Athenian trireme, 216.
Draper (Prof. J. W.) on the diffrac-
tion spectrum, 153.

Earth, on the figure, dimensions, and
mean specific gravity of the, 129;
on the mean density of the, 527;
on the stability of loose, 292; on
the electrical effects produced by
the contact of, with water, 297.
Earthquake, on the occurrence of an,
at Rhodes, 146.

Egerton (Sir P. G.) on fish-remains
from the neighbourhood of Ludlow,
386.

202

-

figures, on new methods of pro-
ducing and fixing, 63.

force, on some new phænomena
of, 204.

heat, note on, 223.
Electricity, of the air and earth, on
the, 296; on the motion of, in wires,
393.

dynamic, on the development
of, by the immersion of unequally
heated metals in liquids, 1.

statical, on quantitative mea-
surement in, 204.
Electro-physiological researches, 454.
Elements, on the natural groupings
of the, 423, 480.

Elephant, on the British species of
fossil, 462.

Elliot (J.) on new forms of the stereo-
scope, 78, 104, 218.

Ellis (Prof. G. V.) on the nature of the
involuntary muscular fibre, 456.
Equations of the fifth degree, on the
theory of, 354.

Ethylene, on some compounds of, 374.
Eudialite and eukolite, comparative

examination and analysis of, 391.
Factorial expression, on the summa-
tion of a certain, 419.

Falconer (Dr. H.) on two species of
the fossil mammalian genus Plagiau-
lax, 385; on the British species of
fossil mastodon and elephant, 462.
Faraday (Prof.) on the conservation of
force, 225; on the twinkling of the
stars, 301; on the persistent ap-
pearance of the lightning-flash, 506.
Faröelite, on the composition of, 50.
Faye (M.) on the coloration of the
moon during eclipses, 78.
Fergusonite, on the composition of,95.
Fernet (M.) on the absorption of car-
bonic acid by solutions of salts, 118.
Field (F.) on the existence of silver in
sea-water, 524.
Fish-remains, on some, from the neigh-
bourhood of Ludlow, 386.

Fluids in motion, on the thermal effects
of, 286.

Fluorine in the blood, on M. J. Nicklès'

claim to be the discoverer of, 162.
Foam, remarks on, 352; on the tem-
perature of, 467.

Foote (E.) on the heat in the sun's
rays, 167.

Foraminifera, on the, 384.
Forbes (D.) on the mineral species
tyrite, 91; on the chemical com-
position of the Silurian and Cam-
brian limestones, 365.

Force, on the conservation of, 225.
Foucault's gyroscope, observations on,

31.

Frankland (Dr. E.) on organo-metallic
bodies, 379.

Furnaces for high temperatures, de-
scriptions of
new, 123.
Gaïdic acid, on, 185.

Gall-bladder, on the functions of the
mucous membrane of the, 145.
Gases, on the absorption of various,
by alcohol, and solutions of salts,
119; on the electrical state of, 296;
on the sounds produced by the
combustion of, in tubes, 473.
Geikie (A.) on the geology of Strath,
466.
Geological Society, proceedings of the,
76, 145, 209, 293, 385, 529.
Gericke (M.) on sulphobenzole, 185.
Girard (M.) on the action of nascent
hydrogen on bisulphide of carbon,
187.

Glyoxal and compounds, 39, 66.
Goessmann (M.) on gaïdic acid, 185;
on triphenylamine, 183.
Gore (G.) on the development of
dynamic electricity by the immer-
sion of unequally heated metals in
liquids, 1.

Gravity, on the force of, 225.
Grove (W. R.) on some new methods
of producing and fixing electrical
figures, 63.

Gyroscope, on Foucault's, 31.
Hail, remarks on, 352.
Harris (Sir W. S.) on quantitative
measurement in statical electricity,
and on some new phænomena of
electrical force, 204.
Hauer (Chev. Ch. von) on an apparatus
for determining the solubility of
salts at high temperatures, 304.

Haughton (Rev. S.) on the pitchstone
porphyry of Lough Eske, 116; on
hypostilbite and stilbite, 509.
Hearder (J. N.) on a new instru-
ment for registering a rapid succes-
sion of electrical discharges, 324;
on the improved induction coil, 536.
Heat in the sun's rays, on the, 167;
produced by chemical combination,
on the, 456.

Heddle (Dr.) on mesolite and Faroë-

lite (mesole), 50; on the "antri-
molite" of Thomson, 148; on the
sulphato-carbonate of barytes, 537.
Heiss (Prof.) on the zodiacal light
and on shooting-stars, 220.
Herapath (Dr. W. B.) on the detec-
tion of strychnine, 197.
Hirst (Dr. T. A.) on equally attracting
bodies, 305.

Hofmann (Dr. A. W.) on the action of
sulphuric acid upon the nitriles and
amides, 276.

Holzmann (C. H. A.) on the vibration
of polarized light in the plane of
polarization, 125.

Humphry (Mr.) on the relations of
the vertebrate skeleton to the ner-
vous system, 218.
Hunt (T. S.) on the chemical com-
position of the waters of the St.
Lawrence and Ottaway rivers, 239.
Huxley (Prof.) on a crustacean from
the coal-measures, 465.

Hydrogen, on the action of nascent,
on bisulphide of carbon, 187.
Hyperbola, on a theorem relating to
the rectangular, 423.

Hypostilbite, on the composition of,
509.

Ideas, on the Platonic theory of, 217.
Imperial standard pound, on the con-
struction of the, and its copies of
platinum, 194.

Induction, experiments on, 219.

apparatus, on improved, 55,
471, 536.
Iris, on the circulation of the blood
in the vessels of the, 517; on the
action of certain parts of the solar
spectrum upon the, 520.
Jacob (Capt. W. S.) on the earth's
mean density, 525.
James (Lieut.-Col.) on the figure,
dimensions, and mean specific gra-
vity of the earth, 129.

Joule (J. P.) on the thermal effects
of fluids in motion, 286.

Kemp (G.) on the functions of the
mucous membrane of the gall-
bladder, 145.

King (Rear-Admiral P. P.) on the
specific gravity of sea-water in the
northern and southern hemispheres,
523.

Kirchhoff (G.) on the motion of elec-
tricity in wires, 393.

Kirkby (J. W.) on the occurrence of
a malacostracous crustacean, and of
a new Chiton in the magnesian
limestone of Durham, 213.
Kirkman (Rev. T. P.) on autopolar
polyedra, 459.

Kjerulf (M. T.) on the Silurian rocks

and fossils of Norway, 529.
Kölliker (Prof. A.) on the action of
urari and of strychnia on the
animal economy, 382.

Lamy (M.) on the magnetism and
electrical conductibility of potas-
sium and sodium, 148.

Laophis crotaloides, description of,
210.

Lieben (M.) on the homogeneity of
solutions, 506.

Light, on the polarization of dif-
fracted, 159; on the absorption of,
in traversing comets, 471; on the
measurement of the chemical ac-
tion of, 521.

polarized, vibration of, in the
plane of polarization, 125; on the
dynamical illustration of the mag-
netic and the helcioidal rotatory
effects of transparent bodies on, 198.
Lightning-flash, on the persistent
appearance of the, 506.

Limestones, on the chemical composi-
tion of the Silurian and Cambrian,
365.

Lithium, on the electric conducting
power of, 86; on the atomic weight
of, 121.
Magnesium, on the electric conduct-
ing power of, 81.
Magnetic needle, on the influence
exercised on the, by musical strings
in a state of resonance, 222.

variation at Toronto, on the
lunar-diurnal, 458.

Mallet (M.) on the atomic weight of
lithium, 121.

Manganese, on metallic, 124.
Martin (P. J.) on the anticlinal line
of the London and Hampshire
basins, 33, 109.

Masson (A.) on induction, 219; on
the velocity of sound, and on the
correlation of the physical proper-
ties of bodies, 533.

Mastodon, on the British species of
fossil, 462.

Matteucci (Prof. C.), electro-phy-
siological researches by, 454.
Matthiessen (Dr. A.) on the electric
conducting power of the metals of
the alkalies and alkaline earths, 81.
Mesolite, on the composition of, 50.
Meteorological observations, 79, 151.
Miller (Prof. W. H.) on the anhar-

monic ratio of radii normal to four
faces of a crystal in one zone, 96;
on the construction of the imperial
standard pound, 194; on the ap-
plication of elementary geometry to
crystallography, 345.

Mineral veins, on some remarkable,
293.

Mollusca, on the distribution of the,

on the coast of Norway, 215.
Monteiro (J. J.) on a new locality for

the mineral atacamite, 470.
Moon, on the coloration of the, during
eclipses, 78.

Morris (J.) on the occurrence of allo-
phane at Charlton, Kent, 76.
Moyle (H. J.) on the occurrence of
metalliferous ores in Siam, 147.
Müller (Dr. H.) on some products ob-
tained from Burmese naphtha, 512.
Murchison (Sir R. I.) on the Silurian
rocks and fossils of Norway, and of
the Baltic provinces of Russia, 529.
Muscular fibre, on the nature of the
involuntary, 456.

Naphtha, chemical examination of
Burmese, 513.

Nicol (Prof. J.) on the red sandstones

and quartzites of the North-west of
Scotland, 76; on parallel lines, 412.
Nitrates, on the action of, on vege-
tation, 498.

Nitrites, on the action of sulphuric

acid upon the, 276.

Nitro-acids, on the reduction of the,
188.

Nitrogen, on the assimilation of, by
plants, 497.

Northcote (A. B.) on the constitution
of allophane, 338.

Numbers, on a problem in the parti-
tion of, 245.

Odling (Prof. W.) on the natural
groupings of the elements, 423,480.
Ophidian, on a fossil, from Karabour-
nou, 210.

Organo-metallic bodies, researches
on, 379.

Owen (Prof.) on the Dichodon cuspi-
datus, 209; on a fossil Ophidian
from Karabournou, 210; on the
occurrence of mastodon bones in
Chili, 388; on the Dichobune ovina,
385; on Pliolophus vulpiceps, 530.
Parabenzole, note on, 415.

Parallel lines, on the theory of, 156,
412.

Peligot (M.) on a method for obtain-
ing pure metallic uranium, 123.
Personne (M.) on terebenthilic acid,
184.

Phillips (R.) on the aurora, 510.
Phorone, 188.

Photography, on the application of,
to the physionomic and mental
phænomena of insanity, 133.
Piria (M.) on the formation of alde-
hydes, 188.

Pitchstone porphyry of Lough Eske,
on the composition of the, 116.
Plagiaulax, on two species of, 385.
Pliolophus vulpiceps, description of,
530.

Pole (W.) on colour-blindness, 282.
Polyedra, on autopolar, 459.
Polygon, on the problem of the in-
and-circumscribed, 337.

Porism of the in-and-circumscribed
triangle, observations on the, 19.
Potassium, on the electric conducting
power of, 86, 148.

Prestwich (J.) on some fossiliferous
ironstone occurring on the North
Downs, 211.

Putrefaction, on the phænomena of,
502.

Pygocephalus Cooperi, description of,
465.

Refraction, on various phænomena of,
through semi-lenses or prisms, 71.
Reinsch (Dr. H.) on the influence ex-
ercised on the magnetic needle by
musical strings in a state of reso-
nance, 222.

Reiset (M.) on the phænomena of
putrefaction, 502.

Richardson (Dr. T.) on the analysis
of waters from the Turko-Persian
frontier, 147.

Riche (M.) on tungsten and some of

its compounds, 122.
Ricinoleic acid, on the action of pot-
ash on, 184.

Riess (P.) on electrical heat, 223; on

electric pauses, 261.

Rock-basins, on the formation of, 213.
Roscoe (H. E.) on the measurement

of the chemical action of light, 521.
Rose (H.) on tantalum and its com-
pounds, 275; on the atomic weight
of antimony, 120.

Royal Society, proceedings of the, 71,
129, 194, 276, 373, 452, 510.
Rubidge (R. N.) on the copper-mines
of Namaqualand, 214.

Sabine (Major-Gen. E.) on the lunar-
diurnal magnetic variation at To-
ronto, 458.

Salmon (Rev. G.) on the problem of

the in-and-circumscribed triangle,
190, 267; on the problem of the
in-and-circumscribed polygon, 337.
Salter (J. W.) on two Silurian species
of Acidaspis, 211.

Salts, on an apparatus for determining
the solubility of, at high tempera-
tures, 304.
Scheerer's (Dr.) Introduction to the
Use of the Blowpipe, reviewed, 70.
Schefczik (A.) on the movements of
the floating crystals of some organic
acids, 149.

Schmidt (Prof.) on the Silurian rocks
and fossils of the Baltic provinces
of Russia, 529.

Schneider (M.) on the atomic weight
of antimony, 120.
Schönbein (C. S.) on the connexion
of catalytic phænomena with allo-
tropy, 248, 440.

Schönfeld (M.) on the coefficient of
absorption in water, for sulphurous
acid, sulphuretted hydrogen and
chlorine, 118.

power of, 86, 148.

Solar spectrum, on the action of cer-

tain parts of the, upon the iris, 520.
Solutions, on the homogeneity of, 506.
Sound, on the velocity of, 533.
Sounds produced by the combustion

of gases in tubes, on the, 473.
Souza (Prof. Gomes de) on the deter-
mination of unknown functions
which are involved under definite
integrals, 195.

Spratt (Capt. T.) on some freshwater

deposits in Euboea and Salonika, 146.
Stars, on the twinkling of the, 301.
Stereoscope, on new forms of the
78, 105, 218.

Stereoscopic pictures, on some ano-
malies in the illusion of, 71.
Stewart (B.) on an instrument for re-
gistering changes of temperature,

453.

Stilbite, on the composition of, 509.
Stöhrer (E.) on an improved induction
apparatus, 55.

Stokes (Prof. G. G.) on the polariza-
tion of diffracted light, 159.
Storms, observations on, 299.
Strontium, on the electric conducting
power of, 86.

Strychnine, on the detection of, 197.
Sulpho-acids, remarks on the, 276.
Sulphobenzole and compounds, on,
185.

Sun's rays, on the heat in the, 167.
Tactions, analytical solution of the
problem of, 507.

Tantalum and its compounds, on, 275.