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.
Parasite Sycamore.
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.
Turpentine.
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.
Gum Arabic.
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 adulterated with sand, &c. The gum exudes spontaneously from the bark and trunk of the branches of the tree, in a soft, nearly fluid state, and hardens by exposure to the air, or heat of the sun. It begins to flow in December, immediately after the rainy season, near the flowering time of the tree. Afterwards, as the weather becomes hotter, incisions are made through the bark, to assist the transudation of the juice.—Ibid.