I SEND you several portion of bark taken from diseased Pear trees in my orchard, for your examination. The first appearance of the disease is very slight - quite a small brown speck. As It progresses, the bark becomes darker, and scaly; occasionally it cracks open - usually running up or down the branches, seldom reaching round until badly diseased, which it finally does. The alburnum, or sap wood, now being exposed, the limb perishes in the same way as by ringing or girdling - sometimes the first year, but generally the second. (1)

On one piece of bark you will find about half of it black, the other perfectly sound. This I think is quite different from the first, and I find that it kills the limb in a short time, I dread it worse than the other, and have amputated the limbs on which I hare found it, instanter. (2)

Now, sir, is this not bark-blight, and totally different from leaf-blight? I find no mention of either of them by DowNING, Thomas, or Barey, and have concluded that It differs from all other kinds of blight, and is peculiar to our section of country. With a small microscope, 676. superficial measure, I hare examined closely for insects, which I thought might be lodged in the bark, but found none. The trees from which the bark was cut are dwarfs, grown on the Quince, of various ages from one to six years old. They were remarkably healthy until last August, when every one of them (some 400 of 80 or 90 varieties) were attacked with flre-bllght - something I had never seen before; not one variety escaped, though on some kinds it was much worse than on others. I cut off the affected parts, which were mostly the young and tender terminal shoots, and thus arrested the disease, when they threw out another growth, and before frost they appeared as healthy as before. Having sold my farm, in Jsnusry, 1853, I reserved all my dwarfs, and removed them to my father's garden, a sandy son, they having before stood In a clay soiL Was the change of soil the cause of these different forms of blight? (3) Last winter I removed them to a clay soll, and now find the first form of blight in abundance.

Now if you will point out a remedy, so that I can once more keep my trees healthy, you will do me a great favor; and as a compensation would be glad to have you turn this way in the Pear season, and if I can not present as high flavored, I know I can show you some of the weightiest fellows you have ever seen. (4) can you ten me were seed of the Victoria regia can be obtained, and the price? (ft) Has it ever flowered In open ponds in the United Stales? (6)

Whenever you discover the best Quince for stocks for the Pear, I should like to be informed. Pomological doctors seem to differ. (7) Have yon not altered your opinion since yon published your Fruit Garden You there speak highly of the Upright Quince. Downing says the common, or Apple Quince, is as good as any when once budded, being harder to bud than the Angers.

Should nurserymen be responsible for trees not properly packed for distant transportation ? (8) I have lost many trees and plants, beside having to pay freight and charges, as well as first cost, on bundles and boxes sent me from your State. In some instances, all that I could find was the labels and packing material. This wInter I received a lot of trees packed in three bundles. The matting was rubbed nearly off; the rats had cut nearly every root off, and most of the branches. This was perplexing, I assure you. But more of this at another time - hoping, however, yon will give us an article, In the Horticuiturist, on packing of trees and plants for distant transportation;it is matter of importance to purchasers.

Who makes the best brass garden syringes, and garden engines? Also, prices. (9) M - Hinds Co., Mise.

(1) The pieces of bark affected with this form of blight have much of that cankered, unsound appearance, which the trees of Van Mons Leon le Clere usually presents as they advance in age-We have not seen, in any other instance, any blight or canker like this from Mississippi appearing to be burnt or blistered. When that blight prerailed here, we frequently saw such eases. The only remedy we are at present prepared to suggest; is that of catting off promptly as possible all affected parte.

(3) It might be the cause of the first which is a sort of canker, induced by an unhealthy circulation. 'The. other is, as we have said, the fire-blight under a peculiar form.

(4) What is your best Pear season We only fear it comes too soon. If it were in December or January, we would be there. At any rate, you must let us hear all about them.

(6) Inquire of Messrs. Meehan & Sanders, of Philadelphia. See their advertisement in this journal.

(6) Not to our knowledge.

(7) The Anger* is probably the best of all, as we stated in the Fruit Garden three yean ago. The Pari* or Fontmay stock is not much inferior, and may be even preferable for certain varieties and certain circumstances. The Upright lacks sufficient vigor and hardiness, but it makes a good stock for the Orange, Portugal, and other Quinces.

(8) Nurserymen should suffer the consequences of bad packing, unless they pack as ordered by the purchaser. Packing is not the least important part of the nursery business. Those who do not understand packing, and have not the necessary facilities for doing it, should not meddle with distant trade; if they do, they will certainly get into trouble, and get others in with them.

(9) We have a very good garden engine, made by Messrs. Downs & Co., of Seneca Falls, N. Y., for about $25. We do not know who makes brass syringes. R.L.ALLEN, of New York, keeps a general assortment of garden implements.

I haVE a garden on the bank of the river St Clair, which is planted with fruit trees; the soil is principally of a peaty, vegetable natnre, and when I got it, six years ago, was in a very wet, marshy state, caused by the water coming through the bank from the-land back, but by under-dralnmg it is now quite dry and in soch seasons as the last, rather much so. I have carted on to it a quantity of sand and manured it with stable manure and lime. It has been under cultivation fire years, the most of which time it has been planted with Apple, Pear and Plum trees, which thrive very well were It not for a blight which has attacked them, the manner of which is as follows: - In the month of June, when they are growing rapidly, all at once the leaves become black as if they are burnt, the wood dries up, and the tree dies. I have this season, as well as formerly, lost several young Pear trees by it The Plums do not seem affected by it. but the Pears and Apples are very much so. In the nursery rows some have all this year*s wood blackened, some only part of It, while others have only some of the leaves touched, and others, again, not hurt at all The blight is not confined to any particular kind or size, nor any section of the low ground - sometimes the tallest are taken, and sometimes the smallest.