We recommend to all practical men the article by "B., New Jersey," in our present issue, on pruning the Pear-tree. It contains the essence of what it is desirable to know on the subject, in a condensed form, and we are mistaken, if there will not be found in it much that many practical men have yet to learn.

We have received the rules of the British Penological Society, established in London, in 1854, of which Sir Joseph Paxton is President. This is the first in Great Britain, but we hear nothing of its reports. Will one of Our English correspondents send them as they appear?

The Transactions of the Northwestern Fruit Growers' Association, held at Burlington, Iowa, last September, have at length reached our table. It is the fourth session; the discussions are of great interest; practical men have given their experience; facts are settled, syno-nymes determined; the pamphlet, in short, is necessary to the Western fruit grower.

Plum culture was first discussed, and, of course, our acquaintance "the little Turk," received complimentary attention. Mr. Barry said the plan of paving under trees, gave him the idea of beating the earth hard; a boy, at the same time, jarred the trees, and picked up the punctured plums; and thus the larvae and insects are destroyed, not only protecting the present crop, but lessening the next year's crop of insects. He thinks the idea that we shall ever find a remedy without labor is fallacious, and he admitted that Matthews' remedy, whatever it may be, will require as much or more labor than the above. In short, this pest is left just where he was - on the plums. Dr. Hull said he had invented a labor-saving machine, not heavier than a wheelbarrow, to jar off the punctured fruit, which falls into canvas, with the insects. He said the curoulio attacked his peaches.

It was agreed to recommend the free growing varieties of the American Wild Plum (Prunus Americana) as the most suitable stock on which to work the plum.

Fire-blight; Mr. Fahnestook said, where they cut off the affected spur, they saved the tree, but, if that remained, the disease spread over the trees, and destroyed them clear to the body. Mr. Barry said this virulent form of blight makes its appearance in warm, humid atmosphere, and prompt amputation saves the trees; some varieties are more liable to it. The Buffum Pear is exempt from this disease. This Pear is figured the present month.

Mr. Barry's address was an excellent and practical one. He thought pomology was to make its greatest triumphs in the West. "Who ever saw, before, such apples or such pears as are displayed here? I never have, in all my travels, either at home or abroad. * * * Twenty years ago, two or three nurseries around New York, and an equal number in Massachusetts, supplied the Union. Now, nurseries may be counted by the thousand, even to the shores of the Pacific. * * * Our pomological literature has been created, one may say, within the last ten or fifteen years. * * * Robert Manning, of Salem, Mass., was one of the first who made systematic attempts at a pomological garden; this was in 1823, and, in 1838, he enumerated 160 varieties of apples, 620 of pears, etc, in all, 922 varieties; in 1842, the number was estimated at 2,000 varieties." Mr. Barry made no allusion to Wm. Coxe, who commenced long before. * * * "Mr. Wilder, at the present time, enumerates 1,000 varieties." * * * Mr. J. 8. Cabot, Samuel Walker, B. N. French, Hovey & Co., Wm. Kenrick, etc, received honorable mention, as did the late Mr. Prince, Charles Downing, A. Saul, A. J. Downing, David Thomas, and his son; Thorp, Smith, Hanchett & Co., F. R. Elliott, A. H. Ernst, etc. etc.

Some highly valuable portions of Mr. B.'s address we shall print hereafter.

The subjects of taxation of nurseries, and of tree peddlers, attracted considerable attention, and were discussed in a business-like way. Root grafting, the cultivation of the cherry, the strawberry, etc, were discussed, but we do not find any recommendation from the association of any particular kinds.

Of apples, however, the early Joe, Dutchess of Oldenburg, Mother, Hubbardston, Nonsuch, and the Spice Sweet, were continued for farther trial.

Peck's Pleasant and Primate were recommended for moderate cultivation; the Willow Twig for extensive cultivation; the Newtown Pippin for cultivation in particular localities.

The Bark louse was discussed at some length, and Mr. A. G. Hanford has communicated the remedy he furnished the description of in the Horticulturist, viz: a mixture of tar and oil, put on in the form of paint. Mr. Dunlap was of opinion that the height of this difficulty was now reached, and that the insect would become less troublesome. He uses one pound of potash in seven gallons of water, as a wash, with success.

The Report is satisfactory, and will be, we trust, largely distributed.