Of course there is a flue running back into a small chimney in the back wall to carry off the smoke - just as in our common stoves.

This brick-stove, in its common form, is merely covered with a thick cast iron plate, c. But when a higher and a more uniform temperature is needed than that of an ordinary green-house, Mr. Rivers adds to his brick-stove a cast iron boiler, fig. 3. This boiler is cast in one piece with the exception of the pipes, which are wrought iron, and screw on. It costs in England 30 shillings, (about 87.50,) and is set within the brick-stove directly over the fire chamber, so that its bottom is on a line with the top of the door, a, fig. 2, and its top is covered by the iron plate c. As the water in this boiler becomes heated, it rises and flows through the pipe, e, which is run to one end or quite round the house, and returns, entering the boiler again near its bottom, f. As the boiler is tight, the water, of course, makes the circuit of the whole pipe, and keeps up a constant circulation. The whole pipe, which rises but a few inches in its course, may thus be considered a boiler - the only opening to which is at the highest point of the pipe, e - that is to say, half way round the house - where there is an opening with a small reservoir for supplying it with water.

This is the simplest of all apparatus for heating by hot water, and, in conjunction with the brick-stove, will heat such a house to any desired temperature.

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Fig. 2.

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Fig. 3.

Heart-Shape - high shouldered, and not irregular in outline like the Tartarian. Skin beautiful deep red, becoming nearly black at maturity. Stalk thick, rather short, swollen at both ends, and set in a deep cavity. Flesh, in texture, juiciness and flavor, very much like and fully equal to the Black Tartarian. Tree very luxuriant, foliage very long and large. Ripens with the Tartarian, or a few days later.

We have only to add that when we first saw this cherry in bearing, we supposed it would prove identical with the Great Bigarreau do Mezel, a French cherry described in a previous vol. of this Journal. But a comparison of the foliage and growth of the young trees of both varieties in the same soil, the past season, has proved that the two are quite distinct. We can only say, therefore, that the Great Bigarreau is a very distinct and a very superb foreign cherry, which succeeds admirably here, and must become a great favorite in fruit gardens.

II. Roberts' Red Heart Cherrt. This American variety originated in the garden of Mr. Roberts, of Salem, Mass., and was first brought into notice by the late Robert Manning, Esq., of Salem. A short account of it was published in our work on Fruits, but as we were not then fully aware of its merits, we will now add a few words more in its favor.

This is not a fruit conspicuous by either size or beauty. But it has sterling qualities nevertheless. It is of excellent flavor, bears most abundantly and unfailingly, and is neither affected by rainy or unfavorable seasons, which destroy so many other fine cherries. It hangs a long time on the tree after maturity, and the flavor is particularly agreeable to those who relish something more lively and sprightly than the honied sweetness of most of the heart cherries - by a fine mingling of sugar and acid. Its lateness and excellence, joined to the great hardiness of the tree, commend it as an invaluable fruit for family use.

III. The General Hand Plum. We think this may be called the largest yellow plum known - certainly the largest native variety. Its history is obscure, but we believe it was originated somewhere in Maryland. The first trees were, we believe, sent out from the nursery of Messrs. Sinclair, of Baltimore, a number of years ago, but the variety is still very little known to cultivators.

We first received specimens of it from Mr. Eli Parry, of Lancaster, Pa., and noticed them very briefly in the Horticultural for 1848. The only accurate account published of this fruit, by any reliable practical cultivator, is contained in a note from Mr. A. Fahnestock, of Lancaster, Ohio, in the Horticulturist, vol. Ill, p. 332, in which he says, "from the fruiting of this tree, for eight years vast. and valuable plums, on account of its never having failed to bear a full crop, and its maturing its fruit perfectly. I admit that it is not so finely flavored as the Washington."

Roberts' Red Heart Cherry.

Roberts' Red Heart Cherry.

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Our own opinion of this plum is, that it is simply a good fruit, not of high flavor, but so large, handsome and productive, that it will become a favorite for market cultivation.

Fruit very large, roundish oval, regularly formed, with an obscure suture running half round, and terminating at the top in a small scarred point - the remains of the old style. Skin smooth, deep golden yellow, slightly marbled with greenish yellow. Stalk unusually long, moderately stout, set in a very small shallow cavity - the whole of that end of the fruit being rather flattened. Flesh pale yellow, moderately juicy, sweet and good, though not of high flavor. It parts freely from the stone, which is ovate, light colored, and small for so large a fruit. Branches nearly smooth, leaves large and long, with long foot-stalks. Ripens the first week in September.

IV. The Townsend Apple. One of the most delicious late summer and early autumn apples. It has borne abundantly in our own garden, and has not, so far as we are aware, yet been described. Grafts were sent to us some years ago under this name, by a friend in Pennsylvania, as having bean taken from a tree which sprung up on the site of an Indian clearing in that state. To our own taste, it has no superior among tender, delicate dessert apples of its season.

Fruit of medium size, roundish and usually flattened,smooth and regularly formed. Skin very pale yellow, splashed and streaked with purple-red, and covered with a dense white bloom, (like the Astrachan.) Stalk nearly an inch long, slender, inserted in a deep cavity; calyx wooly, set in a basin of moderate depth. Flesh white, fine-grained, remarkably tender, and of very mild and! agreeable sub-actd flavor. Tree, a moderately luxuriant grower and abundant bearer. Season, middle of August to middle of September.

The Townsend Apple.

The Townsend Apple.