The death of this distinguished botanist and writer on American forest-trees, took place at Vaureal, near Pontoise, France, in November, 1855, as has already been announced. His will proves to be of very great interest to America; he leaves twenty-two thousand dollars to the American Philosophical Society and the Massachusetts Agricultural Society, fourteen thousand dollars to the former, and eight thousand dollars to the latter, for the purpose.of promoting sylviculture and horticulture, and of making experiments on the growth of trees in "sandy, rocky, and bog soils." The principal portion of the bequest is to be invested for income in good farm land; cheap and unproductive land is to be purchased with another portion, and the remainder is to be appropriated to seeding and planting the experimental plantations. We look upon this bequest with peculiar interest; the liberality of a foreigner in thus considering the benefit he can confer upon our country, strikes us as something unique and highly creditable to the donor, as well as being of rare advantage to the world. , It should, and probably will, teach great lessons of practical knowledge.

The. widow of the donor, who is. advanced in life, has a life estate in the money.

It will be in the memory of some of our readers, that we stated some months since the destruction by fire of the entire edition, of letter press of Michaux's great work on trees; the engraved plates, however, were sayed, and the stereotyper has been since engaged in preparing a new and greatly improved edition, which will be ready for delivery in a short time, in company with the Supplement of Nuttall, making, together, five superb royal octavo volumes, with elegantly colored plates. A sixth may hereafter be added containing the never discovered California trees.