There is an orange tree, still living and vigorous, in the orangery at Versailles, which is well ascertained to be above 400 years old. It is designated the Bourbon, having belonged to the celebrated constable of that name in the beginning of the 16th century, and been confiscated to the crown in 1522, at which time it was 100 years old. A crown is placed on the box in which it is planted, with this inscription, "Sown in 1421." Thirty-four orange-trees have lately been received at Windsor, as a present from the king of France to George IV. _Potato Mortar._ M. Cadet-de-Vaux found mortar of lime and sand, and also that made from clay, greatly improved in durability by mixing boiled potatoes with it. _An Experimental Farm,_ As a school of practical husbandry for a part of central France, has been formed by the celebrated Abbé de Pradt. It is situated about a league from Avranches, on the great road from that city to Bort, in the department of Corrèze.--_Foreign Q. Rev._ _A Tunnel under the Vistula, at Warsaw,_ Has been projected. This mode of communication will be of the utmost utility, especially at the times of the breaking up of the frost, when all intercourse is interrupted. The architect is a foreigner, and has engaged to complete the work in the space of three years.--_Paris Paper._ _Small White Slugs,_ In gardens, are more injurious than the larger variety, because their diminutive size escapes the gardener's eye. A good way to keep them under is to make small holes, about an inch deep, and about the diameter of the little finger, round the plants which they infest. Into these holes the slugs will retreat during the day, and they may be killed there by dropping in a little salt, quicklime in powder, or by strong lime and water.--_Gardener's Mag._ _Turkish Method of Preserving Filberts._ When perfectly ripe, remove the husks, and dry the nuts, by rubbing with a coarse cloth; sprinkle the bottom of a stone jar with a very little salt; then place a layer of filberts, adding a small quantity of salt between each layer. The jar must be perfectly dry and clean. Secure the top from air, and keep them in a dry place; and, at the end of six months, they will peel.--_Ibid._ _Extinction of Fires._ When a chimney or flue is on fire, throw into the fire-place one handful after another of flower of sulphur. This, by its combustion, effects the decomposition of the atmospheric air, which is, in consequence, paralysed, or, in effect, annihilated. _Oysters._ After the month of May, it is felony to carry away the caltch (the spawn adhering to stones, old oyster-shells, &c.) and punishable to take any oysters, except those of the size of a half-crown piece, or such as, when the two shells are shut, will admit of a shilling rattling between them.