I NOtice by the agricultural papers of Baltimore, that late spring frosts have lately cut off the peach crop so frequently that the growers of this fruit are disposed to give up its cultivation in despair. I do not know that I can suggest an infallible remedy, but think that I can offer a plan of treatment that will occasionally save a crop. It is simply in the fall or early in the winter, to pile up around the root of each peach-tree a quantity of manure of any kind, and let it remain there until all danger from late frosts has passed, and then this manure can be taken away and applied to any other crop. At the South, where poles are plentiful, four poles of any kind may be lightly notched together in the form of a square, like a log-house, around the root of the tree, to confine the manure, or, where more convenient, four boards may be tacked together and taken away when the manure is taken. It is a well-established fact, that trees, etc, bloom earliest in high, dry, sandy soils, because they are dry and warm, though the produce is comparatively small; while in low, moist, rich soils they are much more backward in blooming, yet the crop is more abundant.

The object aimed at in the application of the manure is, to change the character of the soil, and thus escape the injury, and also the little heat generated by the decomposition of the manure, by ascending into the head of the tree, assists in warding off the injury. Sandy soils well manured and mulched become rich and moist, and therefore cool, and thus vegetation may be sufficiently backward to save the fruit. This fact may be useful for many other purposes, especially where very early crops of vegetables, Ac, are desired, as paying better than later though larger ones. The above plan has been adopted with success by some of our growers of the sweet orange, and is recommended as worthy of a trial on a small scale at least.

Having a Peach orchard, that has heretofore been free from the curculio, invaded this season partially by that little pest, I have devoted more particular attention to its natural history, as far as opportunities offered. With us the curculio punctures the fruit at three different stages of its growth: first, just as the blossom drops, the fruit dropping also soon after; next, when the stone begins to harden, when the worm eats directly through the ,stone, and then the fruit drops. At these two steps the fallen fruit may be gathered and the worms destroyed; but the third attack proves harder to conquer, for this takes place just as the fruit begins to swell, and then the worm eats out and drops on the ground before the fruit is ripe enough to be gathered or eaten. How this last attack is, to be successfully resisted I can not see, and therefore despair of ever getting rid of them in this flourishing and productive young orchard. My only hope of getting any more Peaches free from the curculio is, to start a new orchard at a distance from any old one; and this I intend to do next winter, finding an abundance of Peaches too great a luxury to be dispensed with.

I do not know whether the curculio goes through one, two, or three generations each season, but having some of the worms safely housed in a vial of earth, will soon know how long it will be before they emerge as beetles or perfect insects.

Downing, in treating of pruning the Peach, recommends leaving a leaf-bud at the end of each shoot, in order that the fruit may ripen better. I do not know how true or necessary this may prove with you, but I can affirm, from many observations, that this is not necessary here, as the Peach will grow and ripen just as well when there is no leaf for several buds below it, and it stands alone at the end of the shoot.

I suppose that the quantities of Southern grown Peaches sold in your market have convinced yon all that Clingstone Peaches are quite equal in every respect, and generally less acid with us than the Freestone varieties. With us they are generally preferred as both more juicy and vinous.

My orchard, at least the bearing trees, are entirely seedlings, and larger, handsomer, and finer fruit I have never either seen or tasted, and I have seen and tasted a few varieties in the course of my life. I have most of the best varieties in cultivation, but as the trees are young, and few have borne fruit, I can not draw any fair comparison, and, thanks to the curculio, may not be able to do so for years to come. My seedling trees were not grown for the fruit, but were from stones of fine fruit, and sown for stocks to bud upon, and as many used for this purpose as wanted, and these being left, were set out in my yard in the woods. Among them all there is not one single indifferent or inferior Clingstone, while the Freestone varieties are mostly of only medium quality, several partaking largely of the Nutmeg, and not one, in my opinion, a first-rate fruit. The Clingstones reproduce themselves with much more certainty, and can be generally depended upon, while most of the seedlings of the Freestone will prove medium sized, mealy, inferior fruit.

The worm also injures the Clingstone Peaches much less, for while it eats all around the stone in the Freestone Peach, in the Clingstone a small part of one side of the fruit suffices for its support, and the worm cuts out and drops to the ground before the fruit is ripe, and then the Peach ripens.

I will send you another small box of Pears for samples, as several varieties are now fit to be gathered. Further experience and closer observation satisfy me that the Rousselet de Rheims, at least what I have as such, is the best Pear of its season, and indispensable in every orchard where a succession is desired. I think more of it each succeeding year. The samples that I sent you were much smaller than some that I gathered afterwards, but they were of fair average size. The Bonne d'Ezees were unusually small, owing to too many having been left on the tree, which is still small. It is an early and good bearer, and the fruit is very tender, delicate, and juicy, but it lacks flavor, in my opinion, and the wood cankers badly. I will send you, if not too ripe, a few larger specimens in this box. 1 send you also a few Pear* of a tree sent me by A. Leroy, of Angers, as the Beurre de Boll wilier, but there must be some mistake, as this proves a midsummer instead of a winter fruit. It proves a vigorous grower, early, and a too abundant bearer, and the fruit very tender, juicy, and delicately but not highly flavored. You will find it marked 133. The White (No. 10) and Grey (No. 76) Doyenne, I suppose that you will readily recognize.

Both are larger, especially the Grey, than usual, but I am afraid the latter may prove knotty.

I send one or two samples of my Golden Beurre of Bilboa, (57,) but I am not certain whether it is really that Pear or the Buffain. I received both at the same time from the Parsons, in Flushing, and think that I lost by blight the latter. It grows very vigorously upon the Quince, and bears early, but too abundantly. Do tell which variety it is. Lastly, I send you a few Bartletts, which I suppose that you will readily recognize; therefore will not mark them. The Bartlett does well upon the Quince, bearing larger and earlier ripeaing fruit upon that stock than upon the Pear. I received, years ago, from Paris, a tree labelled Bonne Ente, whether rightly or not I can not say, but certainly a very different fruit from the White Doyenne, somewhat resembling the No. 133 (now sent) in shape, but about double its size, and now about ten or fourteen days since gone. I have not found it an early bearer, but when it did begin it proved too productive, like many others. What I mean by "too productive" is, that unless the fruit that the tree sets is heavily thinued out, it must prove both small and inferior.

If you desire it, I will continue to send you samples and the results of my experience with them, remarking here, what may prove nothing new to old diggers like myself, but of importance to beginners, that without the aid of an experienced Pear-grower, it requires several years' crops of any new variety before it can be fully learned when the fruit ought to be gathered, and when it is ripe; though, with few exceptions, it requires less experience to teach the thumb when to know the latter state.

I would like to have sent you a sample or two of the "Delices de Charles Van Mons," but I thought that they would not keep until you would receive the box. It is, however, a very indifferent fruit, and the tree cankers about as badly as the Beurre d'Aremberg. I forgot to say above that the Bonne Ente is a very tender, juicy, and delicately flavored fruit, that just about fills up the interval between the last of the Rousselet de Rheims and the first of the Bartletts, and therefore I set a higher value upon it than I would were it to ripen at any other period when pears were plentiful.

[The application of manure to a dry, sandy soil, as proposed above, would have the effect of starting the buds sooner than would be the case without such application, and would, therefore, we should suppose, rather increase than lessen the evil complained of. A dry soil is warmer than a moist one, just as a rich soil is warmer than a poor one; but the application of a large body of manure to any soil would have the effect of making it warmer than the soil immediately surrounding it. In the above case, the application of the manure in the fall doubtless protects the soil from variations of temperature, and may thus be of use; the tree will be the better for the application in any event. Are you sure of the third attack of the curculio? We have been watching the little Turk very attentively, but have seen nothing like that. We shall have an article on this subject from Dr. Trimble soon, bfrom which you will probably be able to gather something to assist you in overcoming the curculio. The first lot of pears you sent came in good condition; the second arrived in the midst of our " heated term' and fared badly. Some of them were entirely gone, and others partly so.

What you sent as Golden Beurre was not injured; but it is neither that nor the Buffam, but the Fulton, and as fine as we ever saw it. The Rousselet de Rheims was small but delicious. The Bonne d'Ez6e very good. The Beurre de Boll-willer was not, of course, that variety, but we could make nothing of it; in the midst of its decay, however, it seemed to be a very fine pear. The White Doyenne was gone; the Grey Doyenne, however, was in good condition, and large, but gritty. The Bartlett was also gone. Of all you sent, the Rousselet de Rheims was best, and the Fulton next. We conclude, from the specimens sent, that you are in the midst of a grand pear region, and that you are profiting by it. How is it with Grapes? - Ed].