Dr. Brinckle of Philadelphia, the President of the American Pomologfcal Congress, has given public notice that the next meeting of this body, will be held in Philadelphia on the thirteenth day of September next. (See circular, among Society notices for this month).

This will be the third session of the Congress of Fruit Growers - the first having been held at New-York, and the second at Cincinnati; and there are several reasons why we are led to believe that it will be the largest and most interesting meeting of the kind yet assembled. In the first place, Philadelphia, being in the heart of the middle states, is more centrally situated than any other place that could be selected. In point of climate and variety of horticultural products, that city stands midway between the north and the south, between New-England and the valley of the Mississippi. She stands in the very centre of the great peach district, and we notice with pleasure, that the time of meeting has been fixed earlier than usual, partly, no doubt, with a view to a more extended exhibition of this most delicious of all fruits. Perhaps it is still rather late, but we hope by the aid of ice houses and fruit preservers, it will not be found materially so. Baltimore and Washington can, as we know from the evidences of our own senses, show specimens of this noble fruit that will make northern nomologists feel a sinking of the heart, and the eastern shores of Maryland - from all that we learn, can produce samples of pears that will awaken the competition of the well tried nomologists of Massachusetts.

As Philadelphia is pre-eminently the focus of beautiful plants, and as the Congress will meet in the Chinese Museum building, which is the familiar exhibition ground of the Pennsylvania Horticultural Society, we may expect to have the cornucopia of Pomona gracefully festooned by the loveliest garlands of Flora. There can be no doubt that, altogether, the meeting will be one of no ordinary attraction to all the devotees of Horticulture.

And having said this for the merely superficial interest of the meeting, let us glance at the deeper meaning, and more intrinsic value of this biennial gathering of the fruit growers of the whole Union.

Any body may learn horticulture on his own account, without going to school, or taking lessons from masters. Most persons, in fact do so- - practicing in their own gardens, in the traditional way handed down from father to son - from one generation to the succeeding one. They may even, by the aid of books and practice together, acquire a very high degree of knowledge in the matter. This is being self-taught in the art; and with many pleasures, there are, of course, many drawbacks and errors in this mode of acquiring information.

Horticultural societies, and journals of horticulture, may be considered the schools of the art - where, by the help of practice at home, prizes and competition in pub-lie, and stated rehearsals of all the best talent exercised on the soil, the competitors are stimulated to new exertion, and the taste of the local neighborhood is carried forward and raised to a higher level.

A national congress of cultivators, like this Pomological Congress, takes a still higher ground, and may fairly be considered as the University of horticulturists for the country at large. It is, in the first place, composed mostly of picked men, sent as delegates by all the horticultural and agricultural societies over the whole country. They are men of the widest and most thorough experience in the respective districts to which they belong They bring with them the ripest knowledge, gathered in the field, orchards, and gardens, of their respective states. They exhibit specimens of the products of our widely diversifled soil and climate, to show what each state can produce, both naturally, and by the aid of high culture, and a more beautiful and interesting display, it is not easy to find in any country.

But the interest of the thing does not - as in most horticultural societies - the common schools of horticulture - stop here. In fact, it just commences where those of the societies end. It commences by the discussion - free to all interested in such topics - of the various subjects within the scope of the congress, such as the culture of fruits generally, the comparative merits of different varieties in various parts of the whole Union, the unanimous or partial approval of some varieties - the unanimous or partial condemnation of others; interspersed with lively descriptions of various modes of cultivating, and different degrees of success or failure, all which have the deepest interest for every man who owns a patch of ground which he either cultivates, or hopes to cultivate. When we add to this, that most of the speeches are made by men who are really the yeomanry of the country, who, though they deal in few flowers of rhetoric, illustrate their strong positions by " showing their hands" with good fruits in them, as the best proof of what they and mother earth can do; men whose opinions may lastingly damn or establish the character of a pear, but who, at least, never " pair off," (like their namesakes in the capitol,) to avoid giving their honest opinions.

Judging from the previous sessions of the Pomological Congress, we have no fear of want of either interest or numbers at Philadelphia. All that we fear is, that the members will come with plenty of ideas - but ideas badly arranged and digested. As it is true that the great majority of delegates sent there, are men who are full of experience, and precisely that experience which it is desirable to get out of them for the good of the public, it is no less true, according to our observation, that they are not men in the habit of condensing their thoughts, or so arranging their ideas, as to present their experience in the shortest and clearest manner. This is all from the want of the habit of turning the subject over in their own minds, and so putting it in order, that they can most clearly impart their knowledge and experience to others. It is also true, that many whose duty it is to report to the Congress on the condition of the fruit culture of their own district, neglect to prepare or arrange any materials till the very week of the meeting, or perhaps till the very day when it takes place. Hence, much of the general value of the comparative results are lost to the assembled body, because they cannot be digested and prepared by the chairman till the meeting is over.

We state these facts now, for the purpose of urging them upon the attention of the chairmen in the different states, and begging them to make memoranda and collect materials for their reports from this moment - that of the ripening of the earliest cherry to the time of the meeting itself.

Now that the fruit growing of the country is no longer a pleasant pastime merely - but produces many millions of profit to the country at large, it is worth while for the leading cultivators to remember that their biennial Congress, which, as we have said, is our horticultural university is about to assemble this season, and every one interested is expected to do his duty in the furtherance of all the interests which it seeks to advance.

The Next Pomological Congress #1

Now that every fruit grower who has attended the meetings of this body, has had his own particular hobby recognised and put into print, I trust that some methodical system of action is to be adopted to govern their future proceedings. Various reports will probably be presented for examination; some pertinent to the object, some the reverse - some pure grain, and much chaff. Let strong committees of reference be selected, who can separate the one from the other, and report only what is valuable, and to the purpose. The varieties of fruits themselves, their best localities, soils, 'positions, climates - all indeed, appertaining to them, should be discussed, considered and settled, so far as they can be. Much has been already done - finished, indeed, so far as the subject can admit of it, and new matter should now come up for consideration. Philadelphia is a most favorable point for the meeting, and large delegations from many of the states will be in attendance.

Such gentlemen as have had experience m the previous meetings of this body, may give to this convention great directness, and the results of their deliberations may be of exceeding value. Let a plan early be adopted for publishing the gist of their labors in a book form, which need not be expensive, and its treasury will be liberally repaid from the sales which may be made of its copies. If this body is to be continued, and hold future annual or biennial meetings, it should have its "Transactions," as much as any State Agricultural Society; and if got up as they should be, the record will be indispensable to every nomologist and nurseryman, in guiding his future practice.