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CONTENTS.
ART. I. On Double Stars. By M. ARAGO,
1. What is to be understood by Double Stars ?
Page 1
2. Why is it that these Double Stars have suddenly be-
come an object of such assiduous attention ?
3. The consequences which result from the nature of the
motions which are observed in the Double Stars.
And first, as they relate to the universality of the
Newtonian attraction,
-
4. When the distances of the Double Stars from the
Earth shall have been determined, then the masses
of those of the Stars whose relative motions are
known, may be easily compared with the mass of
the Earth or Sun,
5. The Observations upon the Binary Groups, composed
of independent Stars, may serve to determine the
distance from the Earth of one of the Stars of
which these Groups are composed,
6. The observations of Double Stars, properly so called,
may serve one day to determine either the distances
of these binary groups from the Earth, or to fix a
maximum or minimum limit beyond which they can-
not be placed,
ib.
5
11
12
20
27
7. Concerning the Colours observed in the Multiple Stars, 33
8. The Double Stars have become a means whereby we
may judge of the excellence of Telescopes,
9. Of the part which the doctrine of Probabilities has ful-
filled in the question of Double Stars,
37
39
II. 1. Some Observations on a Note of M. A. VAN BEEK,
purporting to point out an Error in the Bakerian
Lecture of the late Sir HUMPHREY DAVY On
the Relation of Electrical and Chemical Changes."
2. Some Observations on Euchlorine, relative to the
Question of its Decomposition. By JOHN Davy,
M. D., F. R. S., Assistant Inspector of Army Hos-
pitals. Communicated by the Author, through Sir
JAMES MACGRIGOR,
Page 42
III. Remarks on the Remains of a very large Oak Tree,
dug from a Peat-Moss near Lanfine, Ayrshire; and
on the Ancient Caledonian Forest in the West of
Scotland.
By T. BROWN, Esq. F. R. S. Ed.,
M. W. S. Communicated by the Author,
1. Remarks on the Oak Tree,
53
57
2. On the Ancient Caledonian Forest in the West of
Scotland,
IV. Historical Account of Experiments regarding the In-
fluence of Colour on Heat, the Deposition of Dew,.
and Odours. By JAMES STARK, M. D. Edinburgh.
Communicated by the Author,
65
1. On the Absorption of Heat by differently Coloured
Substances,
2. On the Radiation of Heat by differently Coloured
75
77
3. On the Influence of Colour on the Deposition of Dew, 82
4. On the Influence of Colour on Odours,
V. On finding the Dew-Point, &c. from the Cold induced
by the Evaporation of Water. By H. MEIKLE,
Esq. Communicated by the Author,
VI. Observations on the Loamy Deposit called " Loess"
of the Basin of the Rhine. By CHARLES LYELL,
Esq. F. R. S. Foreign Secretary to the Geological
Society, &c. Communicated by the Author,
VII. On the Theory of the Elevation of Mountain Chains,
as advocated by M. ELIE DE BEAUMONT. By Dr
BOUE'. Communicated by the Author,
VIII. An Attempt at a New Arrangement of the Ericaceæ.
By DAVID DON, Esq. Libr. L. S., &c. Communi-
cated by the Author,
83
98
110
123
150
IX. On Malaria,
Page 161
163
X. Observations on Ground-Ice. By the Rev. E. Eis-
DALE. Communicated by the Author,
XI. Notice of an Earthquake at Saena in Peru. By JOHN
REID, Esq. Communicated by the Author, 174
XII. On some of the Cetacea. By Professor TRAILL.
XIII. On WORKMAN'S Correction of Middle Latitude Sail-
ing. By WILLIAM GALBRAITH, A.M., Teacher
of Mathematics, Edinburgh. Communicated by
the Author,
XIV. Observations on the Structure of the Brain, &c.
XV. Chemical Analysis of an Indian Specimen of Mesolite.
By ROBERT D. THOMSON, M. D. H. E. I. C. S.
XVI. Description of several New or Rare Plants which
have lately flowered in the Royal Botanic Garden.
By Dr GRAHAM, Professor of Botany in the Uni-
versity of Edinburgh,
XVII. Proceedings of the Royal Society of Edinburgh.
(Continued from Vol. XVI. p. 194.)
1. On a New Species of Coloured Fringes developed be-
tween certain pieces of Plate-glass, exhibiting a new
variety of polarization, and a peculiar property which
renders them available for the purposes of Micrometry.
By MUNGO PONTON, Esq.
2. A General View of the Phenomena displayed in the
Neighbourhood of Edinburgh by the Igneous Rocks in
their relations with the Secondary Strata; with refer-
ence to a more particular description of the section
which has been lately exposed to view on the south
side of the Castle Hill. By the Right Hon. Lord
GREENOCK,
3. Researches on the Vibrations of Pendulums in Fluid
Mediums. By GEORGE GREEN, Esq. Communicated
by Sir G. FFRENCH BROMHEAD, Bart.
4. Observations on the Fossil Fishes lately found in Ork-
ney. By Dr TRAILL,
177
180
183
186
189
191
193
194
195
5. Notice of further Discoveries at Burdiehouse. By Dr
HIBBERT,
Page 196
6. On the Investigation of Magnetic Intensity, by the Os-
cillations of a Horizontal Needle. By WILLIAM
SNOW HARRIS, ESq. F. R. S.
7. Experiments on Magnetic Intensity made at Liver-
pool and Manchester. By Dr TRAILL,
197
8. Description and Analysis of a Mineral from Faroe, not
before examined. By ARTHUR CONNELL, Esq.
198
XVIII. Premiums offered by the Wernerian Natural History
Society,
XIX. Discovery of the Bones of the Iguanodon in a quarry
of Kentish Rag (a limestone belonging to the
lower greensand formation), near Maidstone, Kent.
Communicated by GIDEON MANTELL, Esq. F. R.S.
1. Mathematical and Astronomical Tables for the Use of Stu-
dents in Mathematics, Practical Astronomers, Surveyors,
Engineers, and Navigators. Second Edition, greatly en-
larged and improved. By WILLIAM GALBRAITH, A. M.,
Teacher of Mathematics, Edinburgh.
2. Illustrations of the Botany and other branches of the Natural
History of the Himalayan Mountains, and of the Flora of
Cashmere. By J. F. ROYLE, Esq. F. L. S. F. G. S. &c.
No. 2. Folio.
199
200
202
203
204
3. The Natural History of Animalcules; containing Descrip- tions of all the known Species of Infusoria, with instruc- tions for procuring and viewing them, &c. Illustrated by upwards of 300 Magnified Figures on steel. By ANDREW PRITCHARD, Esq.
