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as a Body, upon any subject, either of Nature or Art, that comes before them. And therefore the thanks, which are frequently proposed from the Chair, to be given to the authors of such papers as are read at their accustomed meetings, or to the persons through whose hands they received them, are to be considered in no other light than as a matter of civility, in return for the respect shown to the Society by those communications. The like also is to be said with regard to the several projects, inventions, and curiosities of various kinds, which are often exhibited to the Society; the authors whereof, or those who exhibit them, frequently take the liberty to report, and even to certify in the public newspapers, that they have met with the highest applause and approbation. And therefore it is hoped, that no regard will hereafter be paid to such reports and public notices; which in some instances have been too lightly credited, to the dishonour of the Society.

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] ature or Art, that comes before them. iently proposed from the Chair, to be read at their accustomed meetings, or received them, are to be considered in in return for the respect shown to the ke also is to be said with regard to the - of various kinds, which are often excof, or those who exhibit them, fren to certify in the public newspapers, use and approbation. And therefore r be paid to such reports and public en too lightly credited, to the disho

I. THE BAKERIAN LECTURE.On a method of rendering P

By William Hyde WOLLASTON, M.D. F.R.S.

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II. A description of a Microscopic Doublet. By William H

M.D.F.R.S.

III. An account of some experiments on the Torpedo. By Sir

Bart. F.R.S.

IV. On a method of comparing the light of the sun with that o

By WILLIAM HYDE WOLLASTON, M.D. F.R.S. V. On the water of the Mediterranean. By William Hyde W

F.R.S.

VI. An account of the preliminary experiments and ultimate con

fracting telescope of 7.8 inches aperture, with a fluid con letter addressed to Davies Gilbert, Esq. President of t) By Peter BARLOW, Esq. F.R.S.

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VII. On the dip of the magnetic needle in London, in August 18

EDWARD SABINE of the Royal Artillery, Secretary of the I

VIII. Remarks on the tendency to Calculous Diseases ; with ob.

nature of urinary concretions, and an analysis of a large lection belonging to the Norfolk and Norwich Hospital. LOLY, M.D. F.R.S.

IX. Experiments to determine the difference in the number of vie

an Invariable Pendulum in the Royal Observatory at G the house in London in which Captain Kater's experine By Captain EDWARD Sabine of the Royal Artillery, Royal Society. Communicated by the President and Cou

X. On a definite arrangement, and order of the appearance and progress, of the

Aurora Borealis ; and on its height above the surface of the earth. In a
letter to Davies Gilbert, Esq. M.P. President of the Royal Society.
By the Rev. James FARQUHARSON, Minister of the Parish of Alford,
Aberdeenshire

page 103

XI. Observations on the functions of the Intestinal canal and Liver of the human

Fætus. By Robert LEE, M.D., Physician to the British Lying-in-Hospital. Communicated by Dr. Prout, F.R.S.

121 XII. Experiments on the modulus of Torsion. By BENJAMIN Bevan, Esq. Communicated by the President

127 XIII. On a Differential Barometer. By the late William HYDE WOLLASTON,

M.D. F.R.S. Communicated by HENRY WARBURTON, Esq. F.R.S. . 133 XIV. Some observations relating to the function of digestion. By A. P. W. PHILIP, M.D. F.R.S. L. & E.

137

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XV. Experiments on the friction and abrasion of the surfaces of solids. By

GEORGE RENNIE, Esq. F.R.S.

143

XVI. An attempt to rectify the inaccuracy of some logarithmic formulæ. By

JOHN THOMAS GRAVES, of the Inner Temple, Esq. Communicated by
John Frederick William Herschel, Esq. V.P..

171

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XVII. On the reflexion and decomposition of light at the separating surfaces of

media of the same and of different refractive powers. By David BrewSTER, LL.D. F.R.S. L. & E..

187 XVIII. On the reduction to a vacuum of the vibrations of an Invariable Pendulum.

By Captain Edward Sabine of the Royal Artillery, Secretary of the Royal Society. Communicated by Dr. Thomas Young, Secretary of the late Board of Longitude

207

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Meteorological Journal kept at the Apartments of the Royal Society, by order of

the President and Council.

The PRESIDENT and COUNCIL of the Royal Society adjudged the

MEDALS for the year 1828 as follows. .

A Royal Medal to Professor JOHANN FRIEDRICH Encke of Berlin, Foreign Member of the Royal Society, for his accurate determination of the orbit of a comet of short period, as confirmed by observation.

A Royal Medal to Dr. William Hyde WOLLASTON, Fellow of the Royal Society, for his communication entitled “On a method of rendering Platina malleable,” being the conclusion of a series of researches on the properties of the metallic bodies contained in the ores of platina.

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