Our cotemporary, Mr. Barry, of the Genesee Farmer, who has been spending the summer abroad, from whence he has written the best letters that have appeared in the agricultural journals, on the matters re-ng to the Exhibition, has given his readers the following comparison of the horticultural advantages of both sides of the water. Looking at the matter in so far as relates to fruit and farm culture - we entirely agree with him - but for ornamental gardening, no_climate equals England.

"In regard to fruit culture, our advantages are still greater. An orchard of fruit trees in this country, even when well attended, does not require as much care and labor in five years as it does in one in the greater portion of Europe. A single peach tree in England or France, receives more actual hard labor in one season, than an orchard of one hundred trees in Western New-York; and the price of a single fruit, or at any rate half a dozen, in the markets of London, or Paris, will buy a bushel in New York or Rochester. We complain of curculio destroying our plums and apricots, and this is one of our greatest drawbacks here, but, notwithstanding, I have seen more plums and apricots on a single tree here since I returned, than on any dozen I saw in England. We have the aphis on our cherry trees here, but they are easily destroyed. In both France and England I saw both orchards and nurseries of cherry trees almost ruined by them, and they were said to be unconquerable. We have fire blight, and leaf blight here, and both are sad difficulties, but in France and England they are not without both these maladies.

I saw apple trees very seriously affected in England, with what we designate fire blight. - the ends of the branches black and dead, and there, as here, the real cause is quite unknown to the most skillful cultivators. In France I saw as bad cases of our leaf blight on the pear, as I have ever seen in America. The ravnges of birds in Eurore are tremendous. It is almost impossible to save a crop of cherries. Nets, scarecrows, and a thousand expensive and troublesome devices are practiced, that in this country, where labor is dear, would not be attempted, even though the culture should be abandoned.

"Fruit stealing has been supposed to be peculiarly an American vice, but it is not so by any means, though, probably, quite as prevalent as elsewhere. In other countries fruit gardens are better protected than in ours, and this gives them a greater degree of safety: but in France I saw several nurseries at some distance from houses, where the fruits were removed as soon as they apindefatigable perseverance, the same regard-lessness of labor that I have seen in Europe, we could produce results that we do not now dream of, and we will come to this by and bye - we are every year approaching it nearer and nearer - our culture is becoming more skillful, more thorough and more successful; but we have only made a beginning.

"In Horticulture, as in Agriculture, the United States of America has a great destiny to fulfil. Our territory is not only immense, but so diversified in soil and climate, that all the most valuable grains and fruits can be produced in such abundance as will enable us to supply other countries less favored in these respects. The intimate connection now established between all parts of the world, has removed the barriers which distance heretofore created, and we have now a clear course. Cultivators may redouble their energies with a sure prospect of reward, and if our government, in its wisdom, should see fit to lend a helping hand, all the better."