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The Bakerian Lecture. Experiments and Calculations relative to phy-

sical Optics. By Thomas Young, M.D. F.R.S. . .
page 131

Continuation of an Account of a peculiar Arrangement in the Arteries

distributed on the Muscles of slow-moving Animals, &c. In a Letter

from Mr. Anthony Carlisle to John Symmons, Esq. F.R.S...... 132

An Account of a curious Phenomenon observed on the Glaciers of

Chamouny; together with some occasional Observations concerning

the Propagation of Heat in Fluids. By Benjamin Count of Rumford,

V.P.R.S.

Description of a triple Sulphuret, of Lead, Antimony, and Copper,

from Cornwall; with some Observations upon the various Modes of

Attraction which influence the Formation of Mineral Substances,

and upon the different Kinds of Sulphuret of Copper. By the Count

de Bournon, F.R.S. and L.S...

Analysis of a triple Sulphuret, of Lead, Antimony, and Copper, from

Cornwall. By Charles Hatchett, Esq. F.R.S...

Observations on the Orifices found in certain poisonous Snakes, situated

between the Nostril and the Eye. By Patrick Russell, M.D. F.R.S.

With some Remarks on the Structure of those Orifices; and the

Description of a Bag connected with the Eye, met with in the same

Snakes. By Everard Home, Esq. F.R.S..

An Inquiry concerning the Nature of Heat, and the Mode of its Com-

munication. By Benjamin Count of Rumford, V.P.R.S. . . . . . .

Experiments and Observations on the Motion of the Sap in Trees. In

a Letter from Thomas Andrew Knight, Esq. to the Right Hon. Sir

Joseph Banks, Bart. K.B. P.R.S.

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