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LITERARY AND SCIENTIFIC NOTICES.

SENEGAL-The Geographical Society are in anxious expectation of receiving come important particulars, respecting the Upper Senegal, from M. Prosper Gerardin, who lately returned to Africa. M. Muller, who resided for a considerable time in Egypt, and who accompanied M. Pacho in his Travels in Cyrenaica, is also gone to Senegal, to act in joint capacities of secretary and interpreter.

A new comparative Atlas of ancient and modern Geography, to be drawn from the best known authorities, on a new plan, accompanied by a set of skeleton maps, is announced by Mr. Arrowsmith as in a state of forward

ness.

The first number of Mr. J. G. Jackson's Series of Designs for Villas, on a moderate scale of expense, adapted to the vicinity of the metropolis or large towns, has been published. This part represents elevations and perspective designs, some of which are in great taste, and exhibit some pretty specimens. The work will be completed in about six numbers.

In the press. Letters from the Continent; written during a residence of eighteen months, in 1826 and 7; containing sketches of foreign scenery and manners; with hints as to the modes of travelling, and expense of living, by the Rev. Weever Walter, M. A. work is to form 1 Vol. 8vo.

The

Messrs. George and Edward William Cooke are engaged on a series of fortyeight plates of shipping and craft, from original drawings. The work is to be executed in the same style as London and its vicinity.

FRENCH EXPEDITION. Accounts have been recently received from the French expedition, under the command of Capt. Durville, dated at Tongatabou, one of the Friendly Islands, by which it appears that the Astrolabe has been nearly wrecked by violent tempests tha' drove

her on the rocks. She was eventually got off, in such a shattered condition, having suffered the loss of most of her anchors and cables, that great appreheusions are entertained that she will not be able to weather the Pacific Ocean.

An engraved elevation of the north side of the cathedral church of St. Pauls is about to be published, by subscription, by Mr. G. Gladwin, who has himself measured, drawn and engraved the whole of this magnificent structure, in a striking and correct manner The size of the engraving is about that of an imperial sheet.

NATIVE PLATINA Before Humboldt's return from America, small grains only of platina were known to naturalists. On his arrival in Prussia, he deposited in the Berlin Museum, a native specimen of Peruvian platina, weighing 1083 grains. For twenty years this remained the largest specimen in Europe. Since 1822, the Museum of Madrid has been enriched with another American mass of platina, weighing 11,641 grains. A few months ago, a still more remarkable mass was discovered in the Urals, weighing 10 fiftyfour ninety-ninths Russian pounds. It is deposited in the Museum of St. Petersburgh. The relative weights of the platina of Berlin, Madrid, and Petersburgh are 1, 11, 75.

A small treatise has just been published, by Capt. J. Crisp, of the Madras army, on the method of determining terrestrial longitude, by the moon's right ascension as deduced from her altitudes and culm inations, The author describes the modes in ordinary practice of ascertaining the longitude, the difficulties and objections which each method is subject to, proposing, in preference, the mode above stated, which he has described and illustrated by many examples, and added some useful ta bles of proportional logarithms.

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