PRINTED, BY ORDER OF THE PRESIDENT AND COUNCIL,

From the Journal Book of the Society.

LONDON:

PRINTED BY RICHARD AND JOHN E. TAYLOR, RED LION COURT, FLEET STREET.

MDCCCXLIII.

CONTENTS.

VOL. IV.

1837.

Description of a new Barometer, recently fixed up in the Apartments

of the Royal Society; with remarks on the mode hitherto pursued

at various periods, and an account of that which is now adopted,

for correcting the observed height of the mercury in the Society's

Barometers. By Francis Baily, Esq., Vice-President and Trea-

surer, R.S.

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33

Magnetical Observations made in the West Indies, on the Coasts of

Brazil and North America, in the years 1834, 1835, 1836 and 1837.

By Sir James Everard Home, Bart., Commander Royal Navy,F.R.S.,

the Observations reduced by the Rev. George Fisher, M.A. F.R.S..

On low Fogs and stationary Clouds. By William Kelly, M.D.

On the Colours of Mixed Plates. By Sir David Brewster, K.G.H.

F.R.S. &c.

Of such Ellipsoids, consisting of homogeneous Matter, as are capable

of having the Resultant of the Attraction of the Mass upon a Par-

ticle in the Surface, and a Centrifugal Force caused by a revolving

about one of the Axes, made perpendicular to the Surface. By

James Ivory, K.H. M.A. F.R.S. L. and Ed. Inst. Reg. Sec. Paris,

Corresp. et Reg. Sc. Gotting. Corresp..........

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34

1838.

37

Experimental Researches in Electricity:-Eleventh Series. By Michael

Faraday, Esq. D.C.L. F.R.S. Fullerian Professor of Chemistry at

the Royal Institution, &c.

On the Variation of a Triple Integral. By Richard Abbott, Esq.

F.R.A.S.

Explanation of the Phænomena of Intermitting Springs. By W. L.

Wharton, Esq.

Fourth Letter on Voltaic Combinations, with reference to the mutual

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