Col, Hutchinson's new work on training the dog (respecting which, several gentlemen have written to us, in consequence of a former short notice), is an English work, and has never bean published in this country; it might be, however, to some book-Bailers' advantage.

Horticultural Advertiser; Seneca Lake, Highland Numerics. E. C. Frost, Havana: New York, This is an advertising sheet of Mr. Frost's Nurseries, and looks like a newspaper. This may be a good mode, but we cannot believe the plan equal in value to an insertion in the pages of the Horticulturist, which reaches thousands of those most likely to want Mr. Frost's goods. We have heard the expression, " every man his own washerwoman," but " every man his own advertiser," is at least novel.

(T. T. S.) The exhausting action of fruit is illustrated by the well known fact, that when plants cultivated for the sake of their flowers only, are permitted to ripen their fruit, the power of flowering in a suceeding season is diminished. This is seen in rhododendrons and azaleas. When the rhododendron goes out of flower, it forms clusters of seed vessels, which swell during the summer, and by the autumn become ripe; and they arrive at their size by feeding upon the organizable matter formed in branches, during summer, by the leaves. This organizable matter, if not consumed by the seed-vessels, is stored tap, and applied to the formation of flowers; if it is consumed in the creation of fruit, it is abstracted from whatever means the plant may have of generating flowers. It is therefore obvious, thai to prevent the formation of fruit, is to promote the future production of flowers, and, acting upon this principle, all good gardeners break off the young rhododendron fruit as soon aa the flowers have fallen.

The same rule applies to all other oases.

(A SUBSCRIBER, Andover, Mass.) Tour tender roses may be safely wintered in a small pit dug below the frost, and aired aa often aa the weather will permit. If you have a cellar door exposed to the east, south, or the southeast, and the cellar is tight, place glass inside and below the door, so that it (the door) will open and shut above it. By this means, you may give light during the day, and keep out the cold at night. In such a ready-made pit, you may have, at a trifling cost, quite a winter greenhouse of lemon-trees, oleanders, camel-lias, Ac, and some of your roses, if carefully potted, will give you bloom in the cool weather. Be careful to give air whenever it is of suitable temperature out of doors.