With the view of remedying the scarcity of wood under which this country is beginning to suffer, through the rapid and improvident destruction of the native forests, Michaux recommends also to the American people the cultivation of bushy or spreading trees, producing copses, or Taillis, to which he has applied a special mode of culture, more rational and more favorable to the development of vegetation, and, consequently more profitable to the landholders.

We are informed by the same letter that Michaux was then preparing for publication a work in which he intended succinctly to develop his ideas on those interesting subjects, and to lay open the results of his observations and practical experience, for the particular benefit of the farmers and landholders of the United States.

Michaux's last days were thus passed tranquilly, dividing his time between his favorite occupations of arboriculture and the society of a few friends, among whom the most intimate were President Seguier, Messrs. Macarel, D'Andre* and Vilmorin. Louis Philippe himself, who had known him in this country, never ceased to show him the greatest esteem and affection. He was always happy to see some transatlantic acquaintance. All the Americans who have seen him in Paris, or at his country residence of Vaureal, can testify to the urbanity of his manners and to the cordiality with which he received his visitors. In conversation with Americans nothing afforded him more pleasure than the subject of this country. He listened with amazement to the wonderful accounts of its progress, of the rapid increase of its population, of its wealth and resources, of its success in war and in diplomacy. The names of new cities and innumerable towns, located on sites which, in his time, were still covered with the satire forests; the mention of the multifarious railways, extending their arms in all directions and encircling the whole country in an immense network of iron; the speedy steam travelling by land and water, which would have rendered his long and painful journeys so short and so easy; in fine, the electro-magnetic telegraph, another offspring of American genius - all these wonderful achievements elicited from him the greatest amazement and the most emphatic exclamations; "Mon Dieu, Mon Dieu, est il possible!"

He felt proud to mention that be had been one of the first steam navigators, and boasted of an early acquaintance with Fulton, whom he met at Albany in 1807, under the following circumstances: He was then returning to New York city from his exploration to the lakes Ontario and Erie, and. intended to take passage in a packet boat for New York; but seeing an advertisement of a steamboat to depart the same morning, he had the curiosity to examine her, and be determined to take passage on her. Strange to say, he and a Frenchman who accompanied him were the only passengers on board; it was the first trial trip. Fulton was on board, and, as might be supposed, between two such men, speaking equally well the French language, an intimate friendship was formed, which continued through life. The ardor of this friendship on Michaux's part was proved by his devotion to Fulton's memory.

Michaux, having found in Paris a model, in clay, of a bust of his friend by Houdon, bought it and caused it to be copied in marble by the best artist he could find, at the cost of 1000 francs. He obtained permission afterwards from the Government to have it placed in the Marine Department of the Louvre, near that of Papin, who had done, himself, so much for steam.

Michaux's turn of mind was also literary. Besides his great work on the North American Trees, his Journey to the west of the Alleghany Mountains, and the memoirs already mentioned, he published, in 1831, an essay on the Planera Orenata; in 1852, a memoir on the Causes of Yellow Fever in the United States, and another one on the Culture of the Vine. He may have left also, at his death, some unpublished papers, among which is probably the memoir alluded to in his last communication to the President of the American Philosophical Society. This communication, dated, as I have said above, at Vaureal, near Pontoise, October 24th, 1852, was particularly intended to inform the President and his fellow-members that, desirous of giving the American nation a testimonial of his heartfelt gratitude for the hospitality and assistance which his father and himself had received in this country, during the course of their long and toilsome journeys, he had made testamentary provisions in favor of the Society, with the view to afford the means of promoting the progress of the science of Sylviculture in the United States.

This testament, which Michaux had intrusted to the care of a gentleman of this city, Mr. Isaac Lea, whom he had consulted in the matter, was deposited four years ago in the archives of the Philosophical Society; but was not to be opened until after his death. This was done, consequently, on the 20th of October, 1856, by the Recorder of Wills of the city of Philadelphia. By this document he bequeaths to the American Philosophical Society the sum of fourteen thousand dollars, for special purposes connected with the particular object of his constant aspiration, "The progress of agriculture with reference to the propagation of useful forest trees." By the same instrument, he likewise endows the Society Of Agriculture and Arts of Boston with the sum of eight thousand dollars for similar purposes.

Michaux's demise was made known to the American public by Prof. Asa Gray, in the columns of the July number of the American Journal of Sciences and Arts. It had been communicated to his lady by a friend of Mr. Michaux, who thus relates the circumstances of his death: "I have to speak to you of the death of our good friend, Mr. Michaux. He was carried off with frightful suddenness by a stroke of apoplexy, on the 23d of October, 1855. He had been occupied the whole day planting American trees, and himself directing his journeymen. He withdrew from his work in good health, dined moderately, but with good appetite. He went to bed as usual, and. fell asleep. At about one o'clock in the morning, his wife heard him move aboNt and calling. She instantly rose from her bed and ran to his apartment. He was still struggling on the floor when she entered his room; but on reaching him she found that he had breathed his last. Physicians were called in immediately, but all in vain; life was totally extinct. He died at the age of eighty-five years.

Michaux left no issue. He had lived single to an advanced age, when quite suddenly he became tired of celibacy, and changed abruptly his condition, by marrying a relative of his, who, for a long time, had been the manager of his house, his attendant in sickness, and companion in his solitude. They lived most happily together, and at his death he left her a comfortable provision for the remainder of her life. Mr. Michaux was in easy circumstances, but by no means rich. To his title of Chevalier de la Legion d'Honneur he added those of Correspondent of the French Institute, of Member of the American Philosophical Society, of the Central Society Of Agriculture of Paris, of the Society Of Agriculture and Arts of Boston, etc. Ac.