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INDEX to VOL. XLVII.

ADHESION, on apparent, 465.
Æther, on the number and weight

Bucbanan (J. Y.) on an apparatus for

gas-analysis, 1.
Calendar, on a new form of, 357.
Capillary and electrical phenomena,

on the connexion between, 281.
Carbonic-acid gas, on the electric de-

composition of, 309.
Carpenter (Dr. W. B.) on the phy-

sical cause of ocean-currents,

359,
Cayley (Prof.) on the mathematical

theory of isomers, 444.
Cazin (X.) on the calorific effects of

the magnetism in an electromagnet
with several poles, 392.
Challis (Prof.) on the source of ter-

restrial magnetism, 14; on the
analytical principles of hydrodyna-
mics, 25; on the effects produced
by fog and vapour on the intensity

of sound, 277.
Chambers (F.) on the diurnal varia-

tions of the wind and barometric
pressure at Bombay, 228.
Circle-quadrature, on Sylvester's and

other forms of continued fraction

for, 331.
Cobalt, on the molecular changes

of the molecules of, contained in

electric conductors, 190.
Air, on the condensation of a mixture

of, and steam on cold surfaces, 67;
on the law of gyration of the, 229.
Air-battery, on an, 61.
Alloys, on the electromotive and ther-

moelectric forces of some metallic,
in contact with copper, 28; op the
quantitative analysis of certain, by

means of the spectroscope, 311.
Atmosphere, on the acoustic transpa-

rency and opacity of the, 277, 374.
Barometer, on a variation., 362.
Barrett (Prof. W. F.) on the molecu-

lar changes that accompany the
magnetization of iron, nickel, and

cobalt, 5).
Books, new : -Wilson's Elementary

Geometry, 56; Pierce's Practical
Solid or Descriptive Geometry, 153;
Yarnall's Catalogue of Stars, 155;
Hawtrey's Elements of Euclid,
215; Tait's Quaternions, 364 ;
Muir's Expression of a Quadratic
Surd, 366; Proctor's Universe,

367; Reeks's Elementary Astro-
Bourbouze (M.) on a process for ve-

rifying the nodes in a sounding
Bouty (E.) on the permanent mag-

netism of steel, 315.
Brodie (Sir B. C.) on the electric de-

composition of carbonic-acid gas,

309,
Bromide of silver, on the sensibility

to light of, 273.
Brough (R. S.) on Wheatstone's

bridge, 22.
Broun (J. A.) on the period of hemi-

spherical excess of sun-spots, 311,

that accompany the magnetization

of, 5).
Condensers, on telegraphic signalling

with, 426.
Contact theory of the galvanic cell,

on the new, 401.
Cooke (Prof. J. P.) on the Vermicu-

lites, their crystallographic and
chemical relations to the micas,
and on the variation of the opti-

cal angle in these minerals, 241.
Croll (J.) on the physical cause of

ocean-currents, 94, 168, 434.
De la Rive (A.) on the effects of mag-

netism on the electric discharge
through a rarefied gas, 462.

nomy, 374.

pipe, 80.

Desains (P.) on Newton's coloured

rings, 236.
Dewar (J.) on the physical constants

of hydrogenium, 334.
Diffraction-gratings, on the manufac-

ture and theory of, 81, 193.
Disk, on the heating of a, by rapid

rotation in vacuo, 219.
Ebonite, on the expansibility of, by

heat, 156.
Electric conductors, on the number

and weight of the molecules of
æther contained in electric conduc-
tors, 199).

discharge, on the effects of mag-
netism on the, through a rarefied

gas, 462.

Electrical machines, on a simple con-

densing collector for frictional,

49.

and capillary phenomena, on the
connexion between, 281.

resistance, on the absolute value
of the Siemens mercury unit of,

294, 342.
Electricity, on the action of, on gases,

309.
Electrified conductors, on the dis-

charge of, 157.
Electrodes, on the disintegration of

the, in the galvanic arc of light, 6.
Electromagnet, on the calorific effects

of the magnetism in an, with seve-
ral poles, 392.
Electromagnetic unit, on the number

of electrostatic units in the, 218.
Elliptic transcendent identity, on the

verification of an, 437.
Energy, on the measure of work in

the theory of, 291.
Fleming (J. A.) on the new contact

theory of the galvanic cell, 401.
Fluid, on double refraction in a vis-

cous, in motion, 390.
Fog, on the effects produced by, in

Gases, on the action of electricity on,

309.
Geological Society, proceedings of

the atmosphere, on the intensity of

sound, 277, 374.
Fraunhofer's lines, on the determina-

tion of the prime angle of incidence
and prime azimuth for the different,

321.
Galvanic polarization in liquids free
from gas, observations on, 145.

cell, on the new contact theory
of the, 401.
Gas-analysis, on an apparatus for, 1.

the, 74, 229, 313, 457.
Geometrical problem, on a direct so-

lution of a, 354.
Gladstone (Dr. J. H.) on an air-bat-

tery, 61.
Glaisher (J. W. L.) on the verifica-

tion of an elliptic transcendent

identity, 437.
Gun-cotton, on the spectrum of the

light of exploding, 319.
Hallite, on the crystallographic struc-

ture and chemical composition of,

264.
Hautefeuille (P.)on bydrogenized pal-

ladium, 397.
Heat, on the mechanical equivalent

of, 155; on the expansibility of

ebonite by, 151.
Heaviside (O.) on Wheatstone's

bridge, 93; on telegraphic signal-

ling with condensers, 426.
Helmholtz (Dr.) on galvanic polariza-
tion in liquids free from gas,

145;
on the limits of the effective power
of microscopes, 236.
Herschel (Capt. J.) on a new form of

calendar, 357.
Herwig (H.) on the disintegration of

the electrodes in the galvanic arc
of light, 6; on the number and
weight of the molecules of æther
contained in electric conductors,

190.
Hesse (Mr.) on the direct solution of

a geometrical problem, 354.
Holtz machine, on a spark-adjuster

for the, 467.
Hübener (J.) on a peculiar oecurrence

of crystallized silicic acid, 319.
Hydrodynamies, on the analytical

principles of, 25, 143.
Hydrogenium, on the physical con-

stants of, 334.
Ice, on some crystalline forms of,

122.
Illumination, on some phenomena of,

77.
Insulated wires, on a method of find-

ing faults in, 416.
Iron, on the molecular changes that

accompany the magnetization of,51.
Isomers, on the mathematical theory

of, 444.

Jefferisite, on the crystallographic Maxwell (J. C.) on double refraction

structure and chemical composition in a viscous fluid in motion, 390.
of, 252.

Metallic alloys, on the electromotive
Karstenite, on some crystalline forms and thermoelectric forces of some,
of, 122.

in contact with

copper, 28.
Ketteler (Prof.) on the boundary-con- Micas, on the crystallographic and

ditions of reflection and refraction chemical relations of the vermicu-
for the principal section of media lites to the, 241.
in motion, 411.

Microscopes, on the limits of the
Kohlrausch (F.) on the expansibility effective power of, 236.

of ebonite by heat, 156 ; on the Milky Way, on the constitution of the,
absolute value of the Siemens mer- 370.
cury unit of electrical resistance, Miller (Prof. W. H.) on quartz, ice,
294, 342; on a variation-barome- and Karstenite, 122.
ter, 362.

Mines, on the composition of the
Lallemand (A.) on some phenomena waters from some, 164.
of illumination, 77.

Minot (J. J.) on a spark-adjuster for
Light, measurements of the polariza- the Holtz machine, 467.

tion of the, reflected by the sky and Moon (R.) on the analytical princi-
by one or more plates of glass, 127 ; ples of hydrodynamics, 143; on
on some phenomena of polarization the measure of work in the theory
by diffusion of, 205; on the action of energy, 291.
of, on the electrical resistance of Moutier (J.) on the discharge of elec-
selenium, 216; on extraordinary trified conductors, 157.
developments of, in grinding hard Muir (J.) on Sylvester's and other
stones, 237 ; on the sensibility of forms of continued fraction for
bromide of silver to, 273; on the circle-quadrature, 33).
intensity of reflected and refracted, Newton's coloured rings, experimen-
411.

tal researches on, 236.
Lippmann (G.) on the connexion be- Nickel, on the molecular changes that
tween capillary and electrical phe-

accompany the magnetization of,
pomena, 281.

51.
Liquids, on galvanic polarization in, Nöggerath (Prof. J.) on extraordinary
145.

developments of light in grinding
Lockyer (J. N.) on the quantitative hard stones, 237.

analysis of certain alloys by means Ocean, on the chemistry of the, 1.
of the spectroscope, 31l; on spec- Ocean-currents, on the physical cause
trum-analysis, 384.

of, 94, 168, 359, 434.
Lohse (O). on the spectrum of the Oolites of Northamptonshire, on the

light of exploding gun-cotton, 319. 74.
M‘Kichan (D.) on the number of Ozone, on the composition of th

electrostatic units in the electro- unit of, 310.
magnetic unit, 218.

Palladium, on hydrogenized, 397.
Mädler (Dr. J. H. von), notice of the Phillips (J. A.) on the compositio
late, 320.

of certain mine waters, 164.
Magnetic forces, on the theory of the, Photography, improvements in, 27
318.

Pickering (Prof. E. C.) on the pola
Magnetism, on the source of terres- ization of the light reflected by t
with copper,

trial, 14; on the 26-day period of sky, and by one or more plates
terrestrial, 311; on the calorific

glass, 127.
effects of the, in an electromagnet Polarization, on some phenomena
with several poles, 392; on the by diffusion of light, 205.
effects of, on the electric discharge Quartz, on some crystalline forms
through a rarefied

gas,
462.

122.
of steel, on the permanent, Quincke (G.) on the determinatio
315.

the prime angle of incidence

prime azimuth for the different Sounding pipe, on a process for veri-
Fraunhofer's lines, 321.

fying the nodes in a, 80.
Rayleigh (Lord) on the manufacture Spectroscope, on the quantitative

and theory of diffraction-gratings, analysis of certain alloys by means
81, 193; on the theory of resona- of the, 311.
tors, 419.

Spectrum-analysis, researches in,
Reflection and refraction, on the 384.

boundary-conditions of, for the Steam, on the condensation of a mix-
principal section of media in mo. ture of, and air on cold surfaces,
tion, 411.

67.
Refraction, on double, in a viscous Steel, on the permanent magnetism
fluid in motion, 390.

of, 315.
Resonators, on the theory of, 419. Stefan (J.) on the theory of the mag-
Reynolds (Prof. O.) on the conden- netic forces, 381; on apparent ad-

sation of a mixture of air and steam hesion, 465.
on cold surfaces, 67.

Sterlingite, on the crystallographic
Roberts (S.) on a simple condensing structure and chemical composition

collector for frictional electrical ma- of, 247.
chines, 49.

Stewart (Prof. B.) on the heating of
Roberts (W. C.) on the quantitative a disk by rapid rotation in vacuo,

analysis of certain alloys by means 219.
of the spectroscope, 311.

Sun, on the spectrum of the, 384; on
Rosse (the Earl of) on the electric the temperature of the, 391.
resistance of selenium, 161.

Sundell (Dr. A. F.) on the electro-
Royal Institution, proceedings of the, motive and thermoelectric forces of
374.

some metallic alloys in contact
Royal Society, proceedings of the, 61,

28.
216, 309, 384, 447.

Sun-spots, on the period of hemi-
Sale (Lieut.) on the action of light on spherical excess of, 311.

the electrical resistance of selenium, Tait (Prof. P. G.) on the heating of
216.

a disk by rapid rotation in vacuo,
Sarasin (E.) on the effects of mag- 219,

netism on the electric discharge Telegraph-lines, on the testing of, 22,
through a rarefied gas, 462.

93, 416, 426.
Secchi (Father A.) on the tempera- Terquem (A.) on the vibroscope tono-
ture of the sun, 394.

meter, 212.
Selenium, on the electric resistance Thomson (Prof. J.) on certain rela-
of, 161; on the action of light on

tions between the gaseous, the
the electrical resistance of, 216. liquid, and the solid states of
Serrano y Fatigati (H.) on the me- water-substance, 447.

chanical equivalent of heat, 155. Tonometer, on the transformation of
Sharp (S.) on the oolites of orth- the vibroscope into a, 212.
amptonshire, 74.

Tribe (A.) on an air-battery, 61.
Siemens mercury unit of electrical Troost (L.) on hydrogenized palla-

resistance, on the absolute value dium, 397.
of, 294, 312.

Tyndall (Prof.) on the acoustic trans-
Silicic acid, on a peculiar occurrence parency and opacity of the atmo-
of crystallized, 319.

sphere, 374
Sky, measurements of the polarization Vapour, on the effects produced by,

of the light reflected by the, 127. on the intensity of sound, 277,
Soret (J. L.) on some phenomena of 374.

pularization by diffusion of light, Vermiculites, on the, their crystallo.
205.

graphic and chemical relations to
Sound, on the effects produced by the micas, 241.

fog and vapour in the atmosphere Vibrations, on the determination of
on the intensity of, 277, 374.

the absolute number of, 212.

Vibroscope, on the transformation of between the gaseous, the liquid, the, into a tonometer, 212.

and the solid states of, 447. Vogel (H.) on the sensibility to light Waters, on the composition of certain of bromide of silver, 273.

mine, 164. Warren (T. T. P. Bruce) on a method Wheatstone's bridge, on, 22, 93.

of finding faults in insulated wires, Wind, on the diurnal variations of 416.

the, and barometric pressure at Water-substance, on certain relations Bombay, 228.

END OF THE FORTY-SEVENTH VOLUME.

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