We will now leave Mr. Sharp to make use of our advice to the extent he may think proper.

Let us now turn to H. E. Hooker's remarks. He says he has seen orchards planted with trees from the Jerseys which did very well. Again, he says he has seen orchards planted from the same source that soon died, but did not infect other orchards. He also says* in another place, that diseased trees sent South became healthy. Leaving Mr. Hooker, we now come to the remarks made by P. Barry, of the firm of Ellwanger & Barry. Let us see what friend Barry has to say about this vexed question. He says - what is perhaps nearer the truth than any thing yet said on the subject - that he does not think the disease contagious, and believes the cure for yellows to be a good fertile soil, and the cause of it a very poor soil; a very sensible remark, and coincides with our own views. Now if these remarks of Mr. Barry are true, (and I see no good reason to dispute them,) the disease called yellows by some people is no disease at all, but what is brought on by a poor soil; and it can be brought on at pleasure by using this means, viz., a poor, hungry soil.

He then says, further, that he has had trees from a region badly affected - he does not say from what region, but from other remarks he evidently means some part of the Jerseys; for nearly all the good trees, as well as the bad, come from there - which became healthy when planted on good ground. What does he call badly affected? He says, previously, that the cause was poor soil, and a good soil the cure. From this we are led to infer that the trees he had received were from some poor soil, which goes to confirm what he already says, that the disease is no disease at all, and only such as any person with his eyes open, and with any knowledge of trees, would at once see and reject as poor trees, and avoid buying them. Mr. Barry, however, before leaving the subject, makes some further remarks, which are not so easily explained. I refer to the remark previously made, that he had a lot of trees badly affected, which, when planted on good ground, became healthy. Notice this remark. These trees, no doubt, were year-old trees; at least we may suppose that Mr. Barry would not be likely to plant them older. Then he follows on again, in another remark, and thinks the Peach-tree does not have the "yellows "in New Jersey until three or four years old.

The remarks last made are rather contradictory, as he says he planted an orchard with tress which were badly affected, and which we have every reason to suppose were one year old; so that either the first or last remark must be wrong; for he distinctly says that trees do not get sickly until three or four years old. Mr. Barry then leaves us with strong advice not to purchase any trees from the Jerseys; or, in other words, would advise none to plant Peach-trees that had the appearance of being grown in poor soil. The next and last speaker is F. W. Lay. What does he say? He says this: "Had known many orchards planted with Jersey trees; did not know of a single tree diseased in the whole orchard." Rather contradictory from previous remarks! Not having the pleasure of being acquainted with Mr. Lay, he may be a nurseryman, for aught 1 know to the contrary; but we have no reason to believe but that he speaks the truth.

This was the termination of the several discussions held by our Rochester friends on the disease called yellows.

Now what does it all amount to, when we come to go over all the testimony and analyze it? It seems to conflict in some things; yet, from all the evidence before us, I see nothing that makes the disease new, or any thing like contagious, except what a poor soil will effect, which every person who is familiar with the growth of the Peach can readily understand; and that all those so-called diseases proceed from bad soil and poor cultivation. I can not help believing, however, that many of the remarks which I allude to, and which were made by different individuals against trees raised in this state, were personal, and altogether uncalled for. Nor can I help thinking the whole of the discussion, or nearly so, was for the sole purpose of putting down the sale of trees grown here, and in favor of those grown in the neighborhood of Rochester. As for as I am personally concerned, I care not what others say about trees, believing that people here are perfectly competent to judge of the quality of trees without the assistance of any of our Western friends.

I would also say, and I say it without hesitation, that more good trees are now grown and sent every year from the state of New Jersey than all the other states in the Union. I do not pretend to say, however, that this is by any very superior knowledge or art, for almost every one can grow Peach-trees; but from the favorable locality of the state, and the mild winters that generally prevail, and being altogether free from those great changes in the temperature which the West is subject to, and which will always be a drawback to the cultivation of the Peach successfully, as well as many other kinds of trees.

I would, while speaking of the quality of trees grown in different sections of the country, the defects of which our friends in the West have been so diligent in pointing out, call the attention of parties who are about planting Apple-orchards, which are likely to be of far greater importance to the country at large than the Peach-tree, which people are perfectly able to judge of by appearance, to some defects not so easily detected in the apple. I allude to the millions of Apple-trees that the country is now being flooded with, and distributed in every corner of the land by persons calling themselves tree agents or peddlers, who come from all parts of Western New York. I allude to those trees that are known by the name of root-grafted trees. They are, to be sure, what they term them, root-grafted; but the root, if root it may be called, is a mighty small root, or piece of a root, being only a piece about two inches in length. A more proper name would be to call them cuttings, for they are nothing more nor less than Apple-trees grown from cuttings, the small piece of root only keeping the graft alive until the cutting begins to grow, which makes new roots of itself.

The consequence will be, after a few years, or when they begin to bear, that a great proportion of them will blow down with the wind. Being only cuttings, they are deficient in the strong roots which Apple-trees have that are budded or grafted on the seedling stock above ground, and which are so necessary to make strong, lasting, and permanent trees. And I would advise every person who is about planting out permanent orchards, to have nothing to do with any Apple-tree that is not grafted from six inches to a foot above the ground. They are not only likely to be much hardier, but have roots to sustain them when they come into bearing and are of a large size. This is one reason why so many trees, now to bo seen in the West, that have been planted with these root-cuttings, are dying out in winter. Not only have they this objection, but they are also nearly all more or less lurched over from the effect of the winds; and whoever plants them will be disappointed, sooner or later. Most of the tree peddlers that travel through the country, on account of cheapness, and from the short, bushy roots being more portable than Apple-trees that are grafted above the ground, carry this kind of tree with them.

It is certainly not necessary now, if it ever was, to buy trees of traveling agents who have no fixed place of residence, or responsibility, and who generally are ignorant men, scarcely knowing the name of one tree from another, except what the circulars and other credentials they carry give them, which they generally have in abundance. I would again advise every person to go to a responsible nurseryman - and there are plenty of such - who will send them trees correct to name, who have their character and reputation at stake, and who are generally more competent to judge as to what varieties are best adapted to the locality the purchaser lives in. Not only this, but they can generally purchase all kinds of trees cheaper and better than from such agents. 1 have often been astonished to meet with shrewd business-men, whom you would think would in a moment be able to decide on any thing, and generally come to correct conclusions, who, when they go into the country to plant trees, seem to know nothing at all about this business; and well these agents know that these are the men to begin with, by first showing them their bundle of pictures containing exaggerated paintings of all kinds of fruits and flowers, which they very likely know very little about, having, perhaps, never seen them, and know them only by the paintings they carry around with them.

I am satisfied that more loss and disappointment have been caused to purchasers by peddlers sending small, worthless trees through the country, than would have sufficed to plant the whole Western States. In place of this, they now have to begin and replant all the grounds planted from 1850 to 1855. I refer now to small, worthless Pear-trees as well as Apple-trees, many of them only a year old, and not more than two or three feet high, which was the usual size sent out at that time. The consequence is, they have all, or nearly all, been frozen out by the severe winters, and scarcely a vestige of them is now to be seen. But people have learned wisdom, if it has cost pretty dear. They are. now raising their own trees and planting them of a suitable size, and will in the end, no doubt, although it may have cost something, have the pleasure of raising their own fruits as well as their own trees.

[What can our Western friends have been doing to rouse the quiet and taciturn William Reid? We have never known him to fire such a big gun before. We would add a few words on the " yellows," but the article is already very long, and we let them pass for the present. - Ed].