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MATHEMATICS And PHYSICS.

Mathematics.

Page

Address by G. G. Stokes, M.A., F.R.S., Lucasian Professor of Mathematics

in the University of Cambridge, President of the Section 1

Rev. F. Bashforth on Capillary Attraction 2

Professor Boole on the Differential Equations of Dynamics 3

Rev. Dr. Booth on an Instrument for describing Geometrical Curves; invented

by H. Johnston 3

Professor A. Cayley on a certain Curve of the Fourth Order 3

on the Representation of a Curve in Space by means of

a Cone and Monoid Surface 3

Mr. W. Esson on the Curvature of the Margins of Leaves with reference to

their Growth 3

Sir William Rowan Hamilton, Quaternion Proof of a Theorem of Reci-

procity of Curves in Space 4

Rev. Robert Hahley on a certain Class of Linear Differential Equations .. 4

Mr. T. A. Hirst on the Volumes of Pedal Surfaces 5

Professor William John Macquorn Rankine on the Exact Form and Mo-

tion of Waves at and near the Surface of Deep Water 5

Mr. W. H L. Russell on Recent Discoveries made in the Calculus of

Symbols 7

Mr. C. M. Willich on some Models of Sections of Cubes 8

Astronomy.

Mr. Isaac Ashe's Cosmogonical Speculations 8

Mr. W. R. Birt on a Group of Lunar Craters imperfectly represented in Lunar

Maps 0

Rev. Professor Challis on the Augmentation of the Apparent Diameter of

a Body by its Atmospheric Refraction 12

— on the Zodiacal Light, and on Shooting-Stars 12

Professor Hennessy on some of the Characteristic Differences between the

Configuration of the Surfaces of the Earth and Moon 14

Mr. William Lasskll on a Brilliant Elliptic Ring in the Planetary Nebula,

Ai 20° 50', N.P.D. 101° 56' 14

Page

Rev. R Main, Observed R. A. and N.P.D. of Comet II. 1862 15

on the Dimensions and EUipticity of Mars 15

Mr. J. Nasmyth on some Peculiar Features in the Structure of the Sun's Sur-

face 10

Mr. Norman Poo-son's Observations on Three of the Minor Planets in 1860.

(Communicated by Dr. Lee.) 16

Mr. W. Ogilby on the Excentricity of the Earth, and the Method of finding

the Coordinates of its Centre of Gravity 17

M. J. Schvarcz on the probable Origin of the Heliocentric Theory 17

Rev. Professor Selwyn on Autographs of the Sun 17

Mr. W. Spottiswoode on the Hindu Method of Calculating Eclipses 18

M. C. J. Villa on some Improved Celestial Planispheres 18

Light And Heat.

Mr. A. Claudet on the Means of following the Small Divisions of the Scale

regulating the Distances and Enlargement in the Solar Camera 18

M. A. Des Cloizeaux sur la Relation entre les Phenomenes de la Polarisation
Rotatoire, et les Formes Hemiedres ou II£mimorphes des Cristaux a un ou
a deux Axes Optiques 10

Mr. James Choll on the Cohesion of Gases, and ite relations to Carnot's

Function and to recent Experiments on the Thermal effects of Elastic Fluids

in Motion 21

Rev. J. Dingle on the Supernumerary Bows in the Rainbow 22

Dr. Esselbach on the Duration of Fluorescence 22

Mr. J. M. Mejizies on an Optical Instrument which indicates the Relative

Change of Position of Two Objects (such as Ships at Sea during Night)

which are maintaining Independent Courses 22

Rev. J. B. Reade's Experiments on Photography with Colour 22

Mr. J. Smith on the Complementary Spectrum 23

Mr. Charles Tomlinson on the Motion of Camphor, &c. towards the Light 23

Electbicity, Magnetism.

Mr. James Croll on the Mechanical Power of Electro-Magnetism, with spe-

cial reference to the Theory of Dr. Joule and Dr. Scoresby 24

Dr. Esselbach on Electric Cables, with reference to Observations on the

Malta-Alexandria Telegraph 26

on an Experimental Determination of the Absolute Quantity

of Electric Charge on Condensers 27

Mr. G. M. Guy on an Electromotive Engine 27

Meteoeology.

Mr. Isaac Ashe on Balloon Navigation 27

on some Improvements in the Barometer 28

Mr. John Ball on the Determination of Heights by means of the Barometer 28

Rev. Professor Ciiallis on the Extent of the Earth's Atmosphere 29
Page

Dr. W. Lauder Lindsay on the Geology of the Gold-fields of Auckland, New

Zealand 80

Mr. Charles Moore on the Palaeontology of Mineral Veins; and on the

Secondary Age of some Mineral Veins in the Carboniferous Limestone.... 82

, Contributions to Australian Geology and Palaeontology 83

Mr. C. W. Peach on the Fossils of the Boulder-clay in Caithness 83

on Fossil Fishes from the Old Red Sandstone of Caithness 85

Mr. W. Penqelly on the Correlation of the Slates and Limestones of Devon

and Cornwall with the Old Red Sandstones of Scotland, &c 85

Mr. T. A. Readwin on the Gold-bearing Strata of Merionethshire 87

Mr. C. B. Rose on some Mammalian Remains from the Bed of the German

Ocean 91

Mr. J. W. Salter on the Identity of the Upper Old Red Sandstone with the

Uppermost Devonian (the Marwood Beds of Murehison and Sedgwick), and

of the Middle and Lower Old Red with the Middle and Lower Devonian.. 92

Mr. S. P. Saville on a Skull of the Rhinoceros tichorhintis 94

Mr. H. Seeley on a Whittled Bone from the Barnwell Gravel 94

Rev. Gilbert N. Smith on a Successful Search for Flint Implements in a

Cave called "The Oyle," near Tenby, South Wales 95

Mr. II. C. Sorby on the Cause of the Difference in the State of Preservation

of different kinds of Fossil Shells 95

on the Comparative Structure of Artificial and Natural

Igneous Rocks 96

Rev. W. S. Symonds on Scutes of the Labyrinthodon, from the Keuper Bone-

Breccia of l'endock, Worcestershire 96

Mr. A. B. Wynne on the Geology of a Part of Sligo 96

ZOOLOGY And BOTANY, Including PHYSIOLOGY.

BOTANT.

Mr. James Buckman on the Ennobling of Roots, with particular reference to

the Parsnip 97

—, Experiments with Seed of Malformed Roots 97

Dr. Daubeny's Reply to the Remarks of M. F. Marcet on the Power of Selec-

tion ascribed to the Roots of Plants 98

Mr. F. J. Foot on a Botanical Chart of the Barony of Burren, co. Clare 98

Mr. John Gibbs on the Inflorescence of Plants 98

Dr. W. Laudeh Lindsay on the Toot-poison of New Zealand 98

Rev. W. S. Symonds on the Occurrence of Atplenium viride on an Isolated

Travertine Rock among the Black Mountains of Monmouthshire 100

Zoology.

Professor Allman on the Generative Zooid of Clacatella 100

on an Early Stage in the Development of Comatula 101

on the Structure of Corymorpha imUuu 101

— on some new British Tubu/arulrc 101

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