Leopold de Buch, the celebrated Prussian geologist, died at Berlin on the 4th inst., in the seventy-ninth year of his age.

Baron Alexander Von Humboldt, in communicating the intelligence of his death, in a very affecting letter to Sir R. Murchison, thus speaks of him: "He and I were united by a friendship of sixty-three years--a friendship which never knew interruption.

I found him, in 1791, in Werner's house in Freiburg, when I entered the School of Mines.

We were together in Italy, in Switzerland, in France--four months in Saltzburg. M. De Buch was not only one of the great illustrations of his age--he was a man of noble soul.

His mind left a track of light wherever it passed.

Always in contact with nature herself--he could boast of having extended the limits of geological science.

I grieve for him profoundly--without him I feel desolate.

I consulted him as a master: and his affection (like that of Gay Lussac and that of Arago, who were also his friends) sustained me in my labours.

He was four years my junior--and nothing forewarned me of this misfortune.

It is not at the distance of a few hours only from such a loss that I can say more respecting it."