To a person interested in Horticulture and Pomology, we know of no place in America That offers so many attractions. The collection of bearing fruit trees, (Pears especially,) is unequalled. A week would not be too much to examine them satisfactorily. The trees are all vigorous and productive showing that they are supplied with their appropriate food. The soil is rather light and gravelly, and would only produce such growth as we see on it, under the best management. Among new Pears of which we noticed very beautiful trees, were Conseiller Ranwez, Walker, Theodore Van Mont, Noweeau Poiteau, Dallas, Stirling, and Charles Van Hoogten. We observed a fine tree of Kirtland's Mammoth Cherry with leaves surpassing in size and luxuriance those of any Cherry tree we have ever seen. If the fruit is proportionally large it is well named.

The collection of exotic plants is large, and embraces most of the new, rare, and very fine plants. A specimen of the Cissue discolor, (the most beautiful of all variegated-leaved plants) on Mr. Wilder's table, among his fruit in the Society's tent, was the "observed of all observers." Standing in the midst of the magnificent dishes of Pears, it very happily represented the blending of the useful and beautiful. In the conservatory we were shown a fine flowering specimen of the rare yellow Bignonia Chamberlinii. The collection of Camellias is immense, and embraces a very large number of seedlings. Wilderii and Abby Wilder, are now well known as among the very finest varieties in cultivation. From so many promising seedlings, others of equal, or even greater merit may reasonably be expected. The plant-houses, graperies, dec, are all complete and elegant.

The lawn and ornamental grounds around the mansion, are tastefully arranged and kept in the best possible condition. Refreshing rains had fallen previous to our visit, and the new growth of grass was green and fresh as it could be in the month of May. Mr. Wilder is a farmer as well as a horticulturist. We were shown a pen of beautiful Suffolk pigs, and some fine Durham cows. It is no more than right that the President of the National Agricultural Society should have some fine stock.