of considerable thickness, and square vaults below, descending to a level with the parade, and used at different periods as dungeons. The part on which the vane stood, was erected in the reign of Queen Elizabeth, and the other part was built in the time of Charles II., whose name, with the date, was on a marble slab above the doorway. Of late years the building had been modernized and used as a signal-house and subscription reading-room. If we are not mistaken, the edifice had often been much injured by the encroachments of the sea, and probably this led to its removal.

We notice with much pleasure a handsome volume under the above popular title, which represents that delightful science in the very attractive form of a series of dialogues between a mother and her children. The Huttonian and Wernerian systems and the Mosaic Geology, are here familiarly explained, and illustrative phenomena and recent discoveries glanced at in the progress of the conversations. How much more profitable are such family recreations than sitting hours over spotted pieces of paper, counting the pips of dice, or simpering over fashionable novels and tales of scandal run mad. Bookish families are usually the happiest, at least if we rightly estimate the term. In an early number we shall endeavour to find some portion of these "Conversations" for our columns.

This work will appear early in January. It will be on the same plan as the volume of last year, and will contain at least thirty engravings, on copper and wood. The mechanical department is unusually copious, and there are some abstracts in the chemical, which are of high value.

Trials have recently been made to grow the dry rice of China in Italy; and it is expected that in time an advantageous cultivation of it may be introduced in France.

A correspondent of a French work on gardening thinks that green turf may be obtained in France by trenching the ground, freeing it from stones, covering the surface with two or three inches of rich compost, and then laying on the turf. The improved soil, he thinks, will retain moisture sufficient to keep the turf growing all the summer, and, consequently, green.

Lieutenant Beachey, in his Travels in Cyrene, recently published, has thrown some curious light on the ancient account of these celebrated gardens. It appears, that, like many other wonders, ancient and modern, when reduced to simple truth, they are little more than common occurrences. Baron Humboldt and Mr. Bullock have reduced the floating gardens of Mexico to mud banks, with ditches between; and lieutenant Beachey makes it appear, that the gardens of the Hesperides are nothing more than old stone quarries, the bottoms of which have been cultivated.

The rough bark is first scraped off with knives, and then, with a peculiar instrument, the inner rind is stripped off in long slips; these are tied up in bundles, and put to dry in the sun, and the wood is sold for fuel. The operation was thus explained to bishop Heber by the cinnamon peelers; but in the regular preparation, the outer bark is not scraped off; but the process of fermentation, which the strips undergo when tied up in large quantities, removes the coarse parts. The peelers are called Chaliers.

Mr. Mackintosh, contractor for the government works at Stonehouse Point, Devon, lately had to descend in the diving-bell with workmen to lay the foundation of a sea wall. The machine is fitted with convex glasses, in the upper part, to serve the purpose of windows; and Mr. Mackintosh states, that on several occasions, in clear weather, he has witnessed the sun's rays so concentrated by the circular windows, as to burn the labourers' clothes, when opposed to the focal point, and this when the machine was twenty-five feet under the surface of the water!—From the MS. Journal of the Bristol Nursery Library.

By sowing the seed of the wild cowslip in the garden, a number of varieties will be produced, some of which have flowers of a beautiful bright red colour. May not this process be the first step towards the formation of our garden polyanthus? if that be not, as is generally supposed, a variety of the primrose, rather than of the cowslip.—Gard. Mag.

The principal points are these:—The coffee,—Turkey or Bourbon,—should be roasted only till it is of a cinnamon colour, and closely covered up during the process of roasting. In France this is done in closed iron cylinders, turned over a fire by a handle, like a grindstone. The coffee should be coarsely ground soon after it is roasted, but not until quite cool: some think its aroma is better preserved by beating in a mortar, but this is tedious. The proportions for making coffee are usually one pint of boiling water to two and a half ounces of coffee. The coffee being put into the water, the coffee-pot should be covered up, and left for two hours surrounded with hot cinders, so as to keep up the temperature, without making the liquor boil. Occasionally stir it, and after two hours' infusion, remove it from the fire, and allow it a quarter of an hour to settle, and when perfectly clear, decant it. Isinglass, or hartshorn shavings, are sometimes used to clarify coffee; but by this addition you lose a great portion of its delicious aroma.

Coffee in England is generally over-roasted, and to this fault arise all the inconveniences which are so often attributed to coffee, but which, in reality, are produced by the imperfect modes of its preparation.—From the Coffee-Drinker's Manual, translated from the French.

Attached to the officers' barracks at Winchester, is a very fine specimen of ivy; its trunk has been severed off to a height of more than two feet from the ground, yet it has for years continued in healthy vegetation.—Gard. Mag.

In Kinmel Park, Denbighshire, is an oak tree, which, twenty or thirty years ago, lost one of its largest branches by the wind, and a partial decay was the consequence; a key from a neighbouring sycamore fell into the fracture, which, vegetating, has formed for the old mutilated oak a new head. This parasite appears to have so completely seated itself, that, though the place of its first lodgment is twelve feet from the ground, it is thought that its roots will very soon penetrate to the earth, and at last destroy its venerable nurse.—Ibid.

Common turpentine is the produce of the Scotch pine. Trees with the thickest bark, and which are most exposed to the sun, generally yield the most turpentine. The first incision is made near the foot of the tree, and as the resin flows most abundantly in hot weather, the operations are begun about the end of May, and continued to September. The juice is received into holes dug in the ground, is afterwards taken out with iron ladles, poured into pails, and removed to a hollow trunk, capacious enough to hold three or four barrels. Essential oil of turpentine is obtained by distillation. Common resin is the residuum of the process for obtaining the essential oil. Tar is obtained from the roots and other parts of old trees. Med. Botany.

The purest and finest gum arabic is brought in caravans to Cairo, by the Arabs of the country round Mounts Tor and Sinai, who bring it from this distance on the backs of camels, sown up in bags, and often