With many it appears to be an unsettled question whether the propagation of pears on the quince is to meet with sufficient success to warrant increasing attention. In settling the matter to our satisfaction, there are several points to be considered before adopting any definite conclusion.

In the first place, we must consider the manner of working the pear upon the stock through which it is to receive its future nourishment. We have noticed that different nurserymen have different ways of doing the thing. In some instances we have seen them inoculated from six to ten inches from the ground, thus leaving a long shank of the quince, whose growth is slow, between the pear wood and the root. Now, we hold that, under judicious management, the quince, whose roots become the base of the tree, will attain to a great age, and so will the pear. But this horrid shank between the root of the former and the place of union with the latter, breaks all connection by its comparative slow growth between their prosperity and the advancement of the one through the nourishment of the other, by not affording sufficient strength to sustain the top which has risen from it, and for a like reason, being unable to give the nourishment the increasing growth of the pear demands. Hence, the pear becomes sickly, a separation at the point of improper union commences, and death follows.

Then come bitter denunciations against dwarf trees, and the inexperienced cultivator declares them all a humbug to get money, and abandons their culture.

There is another class of nurserymen, who either understand their business better, or act from more honorable principles. These, inoculate their stock nearer the earth, so that only a little space is left between the root and the new top. Such trees, we are confident, can be so managed as to secure a vigorous growth and a good old age.

In order to secure these objects, the tree should be set so that the whole of the stock, and a part of the scion will be covered with the earth. With some kinds of trees, we are aware this operation would be injurious, if not dangerous, but the habits of the quince, if the soil is favorable, will fully warrant it, as all who have cultivated it must be aware from the freedom with which it takes root from cuttings. This same freedom will be indulged in by the entire wood of the stock, so that an increase of nourishing power will be given by planting it under ground. And in this manner of proceeding, the collar of the tree, or point where the roots and top are united, will be formed of the more thrifty wood of the pear - perhaps at the point of inoculation, where, in the course of growth, a change of habit will develop itself.

It has been held by some writers, whose experience entitles their opinion to full credit, that when dwarfs are planted out so that a part of the pear is covered by earth, roots will issue from it, which will increase the age and strength of the tree. Our individual experience is yet too limited to speak confidently on the subject, yet we are certain that roots will be so thrown out, and where proper culture is given we can see no satisfactory reason why they will not become healthy, supporting roots. Admitting it to be so, there can be no doubt but pears propagated in this way will attain an ample size, and fruitful old age.

We have alluded to the different course pursued by nurserymen in propagating dwarfs. The evils of failure, however, do not rest altogether on their way of doing things. Cultivators are quite too apt to neglect their labors, and then, in course of failure, throw back the blame on the nurseryman, his manner of growing, or taking up his trees, or almost anything else that will excuse their own negligence. How often we have seen the roots of trees warmed in the sun, dried in the wind for hours before planting out, and then set in holes dug in hard earth hardly large enough to receive them, and then covered with as much haste as though they were infecte4 with smallpox, with the very first material that comes to hand - turf, stone, hard earth - anything that will fill the hole and kill the suffering tree thrown in, while to give it firmness, a half-a-dozen stamps of a heavy man are made on the earth as the closing act of a hasty operation. When will men learn that trees are things of life, and possess, in delicate proportions, the organs of healthy and successful vegetation? Until they do, there is no wonder that their trees, allowed to suffer from management so foreign to their nature and habits, die, and blast the expectations of their murderers.

It is an admitted fact, by those best acquainted with vegetable physiology, we believe, that all care should be taken in planting out trees to give the root as much of the ease and freedom of nature as possible, and that the space unoccupied by the root, not only in juxtaposition, but its surroundings, should be occupied by a soil best adapted to its future nourishment. The hardy trees, of the forest, to thrive well, require this, and how much more do fruit-trees. That dwarfs require it in a much greater amount, no one conversant with their growth and habits will deny. Of course, then, the ground they are to occupy should be well prepared before they are placed in it, by a thorough subsoiling or deep and uniform spading, not confined merely to the few feet the tree occupies, but all the space between the trees. Spading is preferable, because it enables the operator to disturb the minutest particle of soil, and what is better yet, to invest it completely, that is, to throw the top soil, well ameliorated by previous culture, to the bottom, and bring earth which has never felt the rays of the sun, to the surface, where atmospheric influence will, in due time, improve and fertilize it.

How seldom this thorough preparation of soil is given, we shall not attempt to decide, but where it is given, and proper trees are properly planted, we have not a doubt but the culture of dwarfs may be sufficiently successful to warrant its adoption in every garden.

In the midst of diseases to which such trees are liable, we have as yet discovered none but the blight. The trees should be carefully watched to discover its earliest approach, and as soon as it shows itself, the infected part should all bo removed with a sharp knife, and grafting wax applied over the wound. We have tried this in a few cases, and in all of them the disease was stopped, and a sound, healthy bark had entirely covered the wounds in autumn. It requires only just the amount of time which every cultivator ought, for pleasure's sake, to spend among his trees daily, and a little close watchfulness to discover the small black spot in the bark and remove it.

Very well for the garden, but not out of it; provided you confine yourself to half a dozen varieties.