Downing is dead !Yet how little of such men can perish! The clayey tenement may indeed fall and crumble; but to him who dwelt in it, a place is assigned in the firmament of American genius, far above the storms and convulsions of earth, in that clear upper sky, where he shall shine forever to illumine the path of intelligence, enterprise, and virtue, and henceforth to enkindle in the human mind a love of order, taste, and beauty. We rank him with those who start improvements which advance ages after they are dead, and who are justly entitled to the consideration and gratitude of mankind. Washington and his illustrious associates are dead; but the liberty which they achieved still lives and marches in triumph and glory through the earth. Franklin is dead; but the spark which his miraculous wand drew from heaven speaks with tongues of fire, and electrifies the globe. Fulton is dead; but he awoke the spirit of invention which turns the machinery of man - aye, he awoke also the genius of navigation - 'And heaven inspired To love of useful glory, roused mankind, And in unbounded commerce mixed the world.'

Downing also is dead; but the principles of artistic propriety and ornament, of rural economy and domestic comfort, which be revealed, await a more full and perfect development; and as they advance toward their glorious consummation, grateful millions will honor and cherish his name. His memory shall live forever.

Mr. Wilder is now President of this National Society for the third biennial term. At its recent meeting in Boston, September last, he delivered an address which evinced a thorough acquaintance with the object it seeks to promote, and of which some account has already been given to our readers. This address embodies a great amount of experience, and of scientific and practical knowledge, and will richly reward those who diligently study it and reduce its principles to practice.

During its session, which continued for three days, Mr. Wilder gave a splendid levee to the members of the Society; about one hundred and fifty were present, including His Excellency the Governor, His Honor the Mayor, and other distinguished guests. At the close of the session, Hon. Mr. Benson, M. C. from Maine, proposed the following resolution:

Resolved, That the thanks of the Society are most cordially presented to the President, Hon. Marshall P. Wilder, for the prompt, able, and impartial manner in which he has presided over its deliberations; and we hereby assure him that the members will long cherish a lively recollection of the pleasure enjoyed at his bountiful and brilliant festive entertainment with which he complimented the Society.

Mr. Lines of Connecticut, said he was unwilling that this resolution should pass with a silent vote. It was due to the gentleman who has presided over the discussions of the Society with so much dignity and ability. He considered that the position in pomology which the President had reached, conferred more honor upon him than the Presidency of the United States could do. A gentleman who confers such immense benefits upon the whole country - he might say the world - as Hon. Mr. Wilder does, is entitled to distinguished honors. He hoped this resolution would be passed by a standing vote. Several other gentlemen offered remarks in the highest degree complimentary.

The resolution was unanimously adopted, every delegate rising in his seat.

This Society has already accomplished much, and promises to do still more to improve and perfect the fruits of the country.

The prominent part which Mr. Wilder has been called to take, for many years, in enterprises and associations for the promotion of horticulture, well qualified him for a leader in efforts for the advancement of American agriculture. For years, with lively interest, he watched the improvements made in the mechanic arts, in manufactures and commerce, and his desire kindled to witness in Massachusetts, and throughout the country, a corresponding progress in husbandry.

In this noble cause, he commenced his efforts at home, where every reform should begin. He signed a call for a convention of husbandmen in Dedham, which resulted in the organization of the Norfolk County Agricultural Society, and of which he was elected President, an office which he still holds. At its first exhibition he delivered an oration, characterized by elegance and force, on agricultural education, in which he was nobly sustained by such men as Lincoln, Briggs, Winthrop, Quincy, Everett, Webster, and others, who together constituted a galaxy of genius seldom witnessed. Many thousands were present, and the county was carried in favor of the cause by acclamation.

This address was followed with speeches by the distinguished gentlemen above named, whose thrilling appeals swayed the assembled thousands, and awoke a new interest in agriculture. On this and subjects pertaining thereto, Mr. Wilder subsequently addressed similar associations in the counties of Bristol, Hampshire, and Berkshire, in Massachusetts, and also the State Society Of New Hampshire.

On the latter of these occasions he concluded in these patriotic words:

"When I consider my country's vast extent of territory, her agricultural resources, her thriving arts, and manufactures, her rapid growth in intelligence, wealth, and power, the hundred millions of human beings who will inhabit her at the close of the present century, I can but exclaim - my country, my country! glorious prospects are before thee! Union, wealth, and power; intelligence, virtue, and immortal renown !"

These efforts were successful - they awoke a deeper and more general interest in the cause of agriculture. This appears in the appeals made in its behalf the next winter to the Agricultural Committee of the Legislature for govermental aid in its behalf. Mr. Wilder was then President of the Senate. He presented the cause to the Legislature; and a bill was passed authorizing the Governor, with the concurrence of the Executive Council of Massachusetts, to appoint a special board of commission-ers to examine the subject and to report to the next Legislature. Mr. Wilder was appointed Chairman of this Board; and the next year he, in connection with the Rev. Dr. Hitchcock, then President of Amherst College, made an elaborate report, showing the advantages to European countries from their agricultural schools and colleges.