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EDINBURGH:

PRINTED BY NEILL AND COMPANY, OLD FISHMARKET.

CONTENTS.

ART. I. The Life and Writings of LOUIS AGASSIZ, Doctor of

Philosophy and Medicine, LL.D. of Edinburgh

and Dublin, Knight of the Order of the Red Eagle

of Prussia, formerly Professor of Natural History

in the Academy of Neufchâtel, now Professor of

Zoology and Geology at Cambridge, in the

United States of America, &c., &c., &c.,

II. Researches into the Effects of certain Physical and

Chemical Agents on the Nervous System. By

MARSHALL HALL, M.D., F.R.S., Foreign Asso-

ciate of the Royal Academy of Medicine of Paris,

&c. (With a Plate.) Communicated by the Au-

thor. (Concluded from vol. xlv., p. 267.)

SECTION II. On the Electrogenic Condition of the Spi-

nal Marrow, and of the Incident Spinal Nerves :—

PAGE

1. On the Electrogenic Condition of the Spinal

2. On the Electrogenic State of Incident Nerves,

3. On Primary and Superadded Voltaic Circuits,

III. On the Vegetable Colonisation of the British Islands,

Shetland, Feroe, and Iceland. By M. CH. MAR-

IV. Anniversary Address, for 1848, to the Ethnological

Society of London, on the recent Progress of

Ethnology. By the President, JAMES COWLES

PRICHARD, M.D., F.R.S., Corresponding Member

of the Institute of France, &c. Communicated by

the Ethnological Society. (Concluded from vol.

PAGR

V. On the Vegetation of the Carboniferous Period, as

compared with that of the present day. By Dr

HOOKER, Botanist to the Geological Survey of the

United Kingdom. (Concluded from vol. xlv.,

On the probable extent of the Flora of the Coal-Forma-

tion in Britain,

VI. On Dolomisation. By A. VON MORLOT,

VII. On Emerald Nickel from Texas, Lancaster County,

Pa. By Professor B. SILLIMAN, Junior,

VIII. On the Erratic Formation of North America. Letter

from M. DESOR to M. DE VERNEUIL, dated Bos-

ton, November 7, 1847,

IX. Report on the Timber Trees of Bengal. By Captain

X. Decomposition of Substances by Steam, and Manu-

facture of Sulphate and Muriate of Potash,

XI. Remarks on the Succession of Organised Beings on

the Surface of the Earth. By Professor F. J.

XII. The Migration of the Ancient Mexicans, and their

Analogy to the existing Indian Tribes of Northern

Mexico. By GEORGE FREDERICK RUXTON, Esq.,

F.E.S. Communicated by the Ethnological So-

XIII. Account of an Extensive Mud-Slide in the Island of

Malta. By A. MILWARD, Esq. (With a Plate.)

Communicated by the Author,

XIV. An Attempt to illustrate the Origin of "Dirt-bands"

in Glaciers. By A. MILWARD, Esq.

nicated by the Author,

XV. Fifteenth Letter on Glaciers; containing Observa-

tions on the Analogies derived from Mud-Slides

on a large Scale, and from some processes in the

Arts, in favour of the Viscous Theory of Glaciers.

Addressed to the Rev. Dr WHEWELL, by Professor

FORBES. (With a Plate.) Communicated by the

XVI. Geological Notes on the Valleys of the Rhine and

Rhone. By ROBERT CHAMBERS, Esq., F.R.S.E.,

&c. Communicated by the Author :-

Alluvial Terraces and Deltas,

Ancient Lake-Beds,

Rock Smoothings and Erratic Blocks,

XVII. On the Smoothed Rock Surfaces of the Porphyritic

Hills of Hohburg, near Wurzen. By Professor

XVIII. On Extracting Pure Gold from Alloys; and on the

Discovery of Tellurium in Virginia, By C. T.

JACKSON, U. S., G. S. :-

1. A new method of extracting Pure Gold from Alloys

and from Ores; by C. T. Jackson, U. S., G. S.

2. Discovery of Tellurium in Virginia; by C. T. Jack-

son, U. S., G. S.,

XIX. Geological Observations made in Scotland, by Profes-

sor STUDER. Contained in a Letter to Professor

XX. On the Formation of Coal. By Mr J. NICOL, F.G.S., 174

XXI. SCIENTIFIC INTELLIGENCE :-

GEOLOGY AND MINERALOGY.

1. On Glaciers. 2. The probable cause of Goitre and

Cretinism. 3. Cause of Irised Colours on Minerals.

4. Emery in Asia Minor. 5. Gold in Canada 6.

Produce of Gold in the Ural and Siberia in the year

1846. 7. Dimorphism of Zinc,

8. Chemist to the Royal Highland and Agricultural

Society. 9. Purifying Liquids by Galvanism. 10.

On the Radiating Power of Substances. By A. Mas-

son. 11. Analysis of the Ashes of Turnip Leaves.

12. On the Inorganic Substances in the different

parts of Plants,
185-186

13. On Auriferous Glass. 14. On the Peculiar Pro-

perty of Coke. By Mr J. Nasmyth. 15. On the

Chemical Character of Steel. By Mr Nasmyth, 187–188

16. Sale of Indian Tea at Kumaoon. 17. The Hima-

layan Alpine Land. 18. Tarnaway Forest in the

Highlands of Scotland. 19. The Himalayan Moun-

tains not favourable for Colonization,

XXII. List of Patents granted for Scotland from 22d Sep-

tember to 22d December 1848,

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