Having read in the Country Gentleman, page 46, Jan. 17th, a report of the discussions of the Fruit-Growers' Society Of Western New York, held at Rochester, January 9th, I find, in article 3, "The Yellows in Peach-trees".

My belief is, that no tree contains any contagious disease within itself, or can contaminate or give a disease to another tree. I also believe that all the diseases that trees have are brought on by local causes. Take away those causes, and trees will be healthy.

Let us look over the various remarks made by our western friends, when in session at Rochester.

First: H. N. Langworthy says a diseased tree of his, having what he supposed to be yellows, produced fruit a month earlier than a healthy one, and put out a number of small shoots with yellow, sickly leaves. Now, I would ask any person that has had any experience in peach-growing, if this is not always the case when a tree dies. It invariably puts out these small, imperfect shoots, with yellow, sickly foliage. This is what people call yellows. I would like to know what other disease trees die of, or if there is any other way. If so, I would like to know what the appearances are. All peach-trees die; some sooner, some later, according to the varieties. Eight to ten years are now as long as we can get peach-trees to live here. They have never lived much longer than this for the last forty years; and occasionally, when we have very severe winters, they do not live as long. But they invariably die off in the same way, with small, yellow, sickly foliage. They did so forty years ago; how much before that period I would not undertake to say. Now, if this is true, what our modern horticulturists call yellows has always existed.

I can only vouch for it being so for the last forty years; but I have no reason to doubt it has been so ever since peach-trees have been cultivated.

Again: we often hear the remark made that peach-trees don't live as lone now as they did formerly. This may be the case occasionally, but not always. Fresh, virgin soil, favorable winters for a number of years, and the fact that many of. the orchards then were natural trees, will account in a great measure for the difference that may sometimes have taken place. But sooner or later these trees all died, and died exactly as they do now, by sending out these small shoots with yellow, sickly leaves; so that nothing unusual, after all, can be made out from H. N. L.'s remarks, except his having budded a peach-tree from a diseased one, and it killed the tree. This may be so in the West; but I believe it has never taken place here. Our trees do not seem to be quite so sensitive.

Dr. Sylvester says that the disease was so bad in New Jersey that they could only get two or three crops; which, after all, is not so bad as it might be. We think that peach-orchards pay well when we get three crops. How many does the doctor get, or expect to get, from his orchard? C. L. Hoag, again, says a gentleman of his acquaintance lost a whole orchard by introducing a diseased tree from the East. He does not say from what part of the East it came; probably, with more modesty than some of his neighbors, he refrained from saying where, but no doubt he meant the Jerseys. People in the Jerseys can not be too careful in introducing peach-trees of foreign growth, lest they should prove as disastrous as the one Mr. Hoag's friend received from the East. After Mr. Hoag we have Mr. Downing's testimony. He says a man in his neighborhood had a tree which was affected, and from this tree the disease has spread all over the neighborhood. Mr. Downing, in a remark to Mr. Hooker, says, again, that the disease does not exist in the South, and that trees sent from the North get healthy again. If this is so, this supposed disease is not as fatal as it has been represented to be by some people; losing its contagious properties when removed to a warmer climate.

Perhaps Mr. Downing is not aware that peach-trees die off in the South in the very same way they do in the North - by ripening their fruit prematurely, and sending out the same weak, sickly shoots that they do in the North. Now I can vouch for this being true, (not hearsay,) having travelled through nearly all the Southern States within the last few years. I have also lived in several of them for short periods, a number of years ago, giving me ample opportunities of observing the Peach-tree. I have also travelled through and had opportunities of observing the growth of the Peach-trees in nearly all of the Northern States. As I have observed, I had frequently heard of old orchards of Peach-trees living to be as large as Apple-trees. Now such things might have existed in the early settlement of the country, when the soil was fresh and newly broken up for the first time; for I believe this to have been the cause. Many of the orchards, also, at that time were natural trees, which are always more vigorous and hardy than those varieties so long under cultivation by budding. From these causes, in a great measure, the old orchards spoken of may be accounted for.

But very few of these old trees are now to be seen, even around Rochester, which are any larger or better looking than many of our own orchards in the Jerseys. I have been told (but this I can not vouch for) that these same orchards are nearly all planted, with few exceptions, with trees which came from the Jerseys. Further west and south, I am not able to say where the trees came from; but, from appearance, they do not seem to be very old - from eight to ten years.

Having digressed a little from the remarks that I commenced with, I will return to what Mr. Sharp says. He undertakes to inform the people, and warns them against some itinerant peddler, (he does'not say whether he comes from the Jerseys or is one of his own peddlers,) having brought into the neighborhood of Rochester a large quantity of trees from the Jerseys, and is now selling them to plant orchards with. I have no knowledge of any nurseryman, in this part of the Jerseys, engaged in such a business; but I have no reason to doubt its truth, for we have many such travelling here, selling trees, with pictures, credentials, and vouchers enough for one of our foreign ministers, going to represent us at the Court of St James, who will agree to furnish every thing in the way of trees, from a Law ton Blackberry to a fine Beurre Pear; and many of these same men tell us they come from your neighborhood. Now I do not say that it would be proper to use harsh means, or to commit any breach of the law, to get rid of these men, who have the assurance to go in among you with such trees; yet I certainly would make an effort to get rid of all such, even if I had, as a last resort, to make use of gentle means, as a warning to others who might be inclined to do the same.