We have shown by actual experiment that our climate is superior to that of either England or France for the production of various foreign fruits and vegetables; the Victoria Regia was found to produce larger flowers and leaves than abroad; already the Stanwick Nectarine has fruited in Boston and Philadelphia better than in England or France. The Mangosteen must next be tried by some enterprising cultivator. We find the following in the Gardeners' Chronicle; it may prove a stimulus to our fruit growers; the Mangosteen should be tried also at the South:

The opinion of practical men concerning the merit of bringing the Mangosteen fruit to maturity in England, has now been pronounced in the strongest manner possible by the award of the Judges of the Horticultural Society on the 16th, when a Gold Banksian Medal was assigned to the beautiful specimen sent from Syon to Gore House by order of the Duke of Northumberland. We believe there is no other instance of a medal equal in value to the Horticultural Society's Gold Banksian having been awarded to a single fruit, nor could anything have justified so great a departure from custom except the combination of the greatest skill in gardening with results as important as those obtained by the production of fruit like the Mangosteen. Had the Horticultural difficulties been fewer, or the quality of the fruit been below the highest, the advent of the Mangosteen could not have been celebrated in such a manner.

It is not surprising that those who have had no opportunity of tasting this delicious fruit should be incredulous as to its excellence. It is difficult indeed to speak of it without an appearance of exaggeration. Nevertheless it will be found that the statements of every traveler who has written about the May lay island, assign it the highest place at the dessert; and, so far as our own taste can be trusted, we wholly concur in that opinion. Not to ocupy space with quotations from English works we will merely cite the words of Rumphius, the celebrated Dutch Governor of Amboyna, who speaks of it in these terms: " When ripe the fruit is delicate and agreeably sweet as the finest Lansehs (another famous Malay fruit tree, of which a variety called the Duku is the domesticated repre-sentation which ought next to engage the attention of the wealthy), and may even be ; mistaken for ripe Grapes. It is at the same time so juicy, that many people can never eat enough of it, so delicious is its fragrance and agreeable its sweetness ; and it is believed that the siek, when appetite or the power of eating is wholly gone, are nevertheless delighted with this fruit; or at least if they will not take to Mangosteens their case is indeed hopeless".

The question still to be considered is whether - the ducal garden at Syon having proved equal to the ripening this fruit, and its excellent quality having been ascertained beyond dispute - it is likely to engage the attention of others, and to become of importance as a general addition to the dessert.

To this, we think, one answer only can be returned; and that in the affirmative. Now that the great preliminary difficulties are overcome, there should be no more reason for failing in obtaining a crop of Mangosteens than of Peaches ; the difference consists in the expense, which however most certainly need not exceed that of a house of Pine Apples. During a period of 22 years the Dukes of Northumberland have patiently awaited the result of various costly experiments instituted to determine under what conditions the plant can be kept in health, well knowing that in the end it would bear its fruit; for it is as certain as any other fact in natural history, that all trees will do so when they have acquired sufficient age, although the length of time demanded by Nature to produce fertility is uncertain, and varies from species to species. In the course of these experiments it has been ascertained that the conditions necessary to the Mangosteen in a domesticated state are abundance of warmth, moisture, light, and above all fresh air, skilfully regulated, as is described by Mr. John Ivison, the present gardener at Syon, at page 819 of our volume for1854; where the manner in which fresh air, that most important of all agents, is admitted is fully explained.

These conditions anybody can imitate. The difficulty is to obtain fruiting plants, and for these we must look either to supplies in War-dian cases from Penang, or to propagation in this country by cuttings or layers. Perhaps grafting on such stocks as Xanthochymus pictorius may also succeed, but it is doubtful whether specimens so obtained will either thrive or "stand." Plants "on their own bottom," as gardeners say, are alone to be trusted. If such could be produced, they will come into bearing immediately, for that maturity of organization which is necessary to the formation of fruit is transmitted by subdivision, along with every other quality.

That the Syon Mangosteen tree has really attained complete vigour, and a power of bearing fruit hereafter regularly, is proved by the fact that the fruits hitherto ripened are perfectly organized. It is true that no seed was found in the fruit that was first gathered ; but one lobe had a seed in the third specimen which had been examined, and Rumphius expressly declares that in Amboyna, where it arrives at perfection, usually only one lobe contains a seed, and very often no seed at all is formed.

There is no country within reach of our shores that can produce it naturally; it must always, therefore, be a tender exotic, and confined to the wealthy, as Pine Apples once were. It possesses the valuable property of keeping well and travelling well. That which was shown at the meeting of the Horticultural Society had been gathered several days, and yet proved excellent when opened.

We take the present opportunity of repeating that it is no small triumph to the Duke of Northumberland that his Grace's garden at Syon should be the only one in the world in which Vanilla, Gloves, Nutmegs, Litchis, and Mangosteens have been brought to equal perfection. We do not mean that no one has fruited Vanilla and Litchis except the noble proprietor of Syon: for the first has long ago been produced in other gardens, and the Litchi, ripened formerly in the forcing house of Mr. John Knight, of Lee Castle. What we do say, and what we think is a most striking illustration of what wealth inteligence, ank skill may effect, is that all the five important productions we have enumerated were never before brought to perfection in one and the same establishment: unless perchance in some Dutch Island in the Malay Archipelago.