This report contains much speculation and matter for future examination. Of course it must partake of the "desultory," as remarked in the preface, but it is suggestive and valuable. The Sorghum saccharatum and Dioscorea batatas receive high praise - perhaps not less than they deserve, though, with regard to the latter, sufficient time has not elapsed to test its value, and many who have unhesitatingly condemned it, have unfortunately purchased the wrong description of plant. Of the Sorghum there are strong hopes, and, just now, these hopes are the more cherished on account of the high prices of sugar and molasses. If any nation can work out these problems, it will be the Americans, one of whose honest mercantile captains assures us that, during his frequent trips to Canton, the Dioscorea was one of the first things laid in on arrival. " Why, then, did you not bring it home?" "Because I never thought to do so V* He, and others, probably never thought of its adaptability to our climate.

The accounts of this plant differ because trials have been made with the small axillary buds as sets, as well as another plant of similar appearance. The sets from the axils of the leaves are necessarily slow. They are very apt to fail. Boots of this yam, which had been made the subject of four different experiments at the Horticultural Society's Garden, London, were lately furnished for exhibition; three had been planted out, six inches apart, in March. No. 1. planted the small axil tubers, about the size of marrow peas, six inches apart; of thirty roots taken up, the weight was 3 lbs. 3 ozs. No. 2. Planted small roots, from three to four inches long but very slender, six inches apart; of forty-eight roots taken up, the weight was 10 lbs. 12 ozs. No. 3. Larger sized roots, about five or six inches long, and stouter than No. 2, were planted six inches apart; of eleven roots taken up, the weight was 5 lbs. 12 ozs. No. 4. Cut roots, of different thicknesses, were planted three inches apart; of eighty roots taken up, the weight was 14 lbs. 4 ozs.; these produced very nice roots,, and more equal in size than any of the others. The three latter cases only were satisfactory, and the axillary buds not encouraging.

Those who have cried humbug, and who consider this mode of condemnation very good fun, should " wait a little." The roots do not swell to an enormous size; on the contrary, they are long and slender, and hence can be planted near together, thus occupying but little ground. If not exactly a substitute for the potato, it is pronounced, both in England and France, by those who should know, a valuable acquisition, if only for feeding cattle and pigs. We are not prepared to recommend or to condemn it, but have thought it right, from the first, to give such knowledge as is passing respecting it.

The Chufa, or earth Almond, has naturalized itself to our climate, and has a value. A tree of the " Titmouse" (not Tittlebat's I), or " thin-shelled" Madeira-nut, variety Juglans regia tenera - the best of all the Walnuts - has proved valuable, and annually bears a fine crop in the garden of Peter Force, at Washington; loamy soil, rather dry than moist, suits this tree; in wet-bottomed land it will not thrive. The Almond (Amygdalis communis) is recommended for the Southern and Middle States. We have succeeded with it, near Philadelphia, in a moderate degree.

The advantages of this tree may be briefly summed up in the following words: It prospers upon indifferent soil; requires but little care in its cultivation; is beautiful as an ornamental tree; useful as a shade tree; and profitable in its production of a much desired fruit, yielding, in its bearing years, about twenty pounds to the tree, which, at fifteen cents a pound, would amount to at least $500 to an acre. The amount of almonds annually imported into the United States is believed to be valued at more than $250,000.

The Soil of the South says of the Chufas: "This is one of the novelties lately introduced that will prove a blessing to the country. Its expressed juice makes a delightful cooling drink, much used in the warm climates of Europe. In some countries, it is ground and distilled, and is said to make a valuable brandy. They are highly relished by children; but their chief utility in this country will be in the nutriment they afford to the hog, being imperishable in the ground, affording him an opportunity of just working enough for his living to keep him in good order. Their immense productiveness is another great recommendation. We have counted this season the product of one seed, which is twelve hundred and fifty perfect nuts, or something more than a quart The top resembles the rush, and is said to be good forage for stock".

The Cork Oak (Quercus suber) is adapted to the climate and soil of many parts of the Middle and Southern States, and hopes are entertained that the importations of the seed will be attended with good results.

The "Prune d'Agen" and "Prune Saint Catharine," have been introduced from France, and grafted on the common plum-tree in all the States north of Maryland, with success. A quantity of the cuttings of " Raisin" and " Currant" Grape-vines have withstood the severity of our climate, as far as heard from. Liquorice is also being successfully cultivated.

The Opium Poppy (Papaver somniferum) is recommended to be experimented with; the annual importation of opium exceeds $400,000. The Vanilla plant, Ginger, Iceland Moss, Orris-Root, medicinal Rhubarb, Castor Oil plant, the Assafoetida plant, Cardamom, Water-Nut, or Trapa, and Lotus, are all suggested for trial.

Among " foreign plants," the report alludes favorably to the Guinea and Tussock Grasses, and, of "fibrous" productions, Manilla Hemp; the Cochineal plant, and Madder, are recommended for trial.

The Tea plant, new varieties of Cotton, and Sugar-Cane, the Boxwood-tree, the European Sweet Chestnut, several varieties of Oaks, as the Edible, the Kermes, the Gall-Nut, with the Date and Tamarind-trees, the Frankincense, or Olibanum-tree, the true Balsam of Gilead (Amyris Gileadensis), Gum Arabic, Mastic, Quassia, Senna, Rhatany, and Bnnya-Bunya, or Araucaria Bidwillii, are all suggested as possible to introduce, every introduction rendering us more independent of other countries. Let all who have opportunities give some attention to these matters; it will be a pretty addition to the pursuit* of the country gentleman, attended with the consciousness of doing something in his day and generation.

The book treats of insects, fertilizers, and a thousand things of interest to the farmer and gardener. The mechanical volumes we most leave to other pens.