The trees are regularly tapped and the coagulated latex which exudes is collected and worked up into rubber.
` Must ' elephants are males in a condition of - probably sexual - excitement, when an abundant discharge of dark oily matter exudes from two pores in the forehead.
Charas, or churrus, is the resin itself collected, as it exudes naturally from the plant, in different ways.
When cut open, it displays an infinity of tiny leaf-buds and stems, and at intervals there exudes from it an aromatic resin, which from its astringent properties is used by the shepherds as a vulnerary, but has not been converted to any commercial purpose.
Biisgen that the sweet secretion (honey-dew) of the aphids is not derived, as generally believed, from the paired cornicles on the fifth abdominal segment, but from the intestine, whence it exudes in drops and is swallowed by the ants.
In Scandinavia a thick turpentine oozes from cracks or fissures in the bark, forming by its congelation a fine yellow resin, known commercially as "spruce rosin," or "frankincense"; it is also procured artificially by cutting off the ends of the lower branches, when it slowly exudes from the extremities.
The fibrous tough roots, softened by soaking in water, and split, are used by the Indians and voyageurs to sew together the birch-bark covering of their canoes; and a resin that exudes from the bark is employed to varnish over the seams. It was introduced to Great Britain at the end of the 17th century and was formerly more extensively planted than at present.
The latex is therefore usually allowed to coagulate on the tree, as it slowly exudes from the incision.
The liquid which exudes from the glandular hairs clothing the leaves and stems of the plant, more especially during the cold season when the seeds ripen, contains a notable proportion of oxalic acid.
Resina, probably Latinized from Greek prpivri, resin), a secretion formed in special resin canals or passages of plants, from many of which, such as, for example, coniferous trees, it exudes in soft tears, hardening into solid masses in the air.
The oil which exudes is mixed with water and heated till the water boils, and the mucilaginous matter in the oil separates as a scum.
The men are usually ' Coco-nut fibre and the gum which exudes from the bread-fruit tree are generally used for " caulking " and " pitching " canoes.
This is produced by placing the finest grapes in casks and drawing off the juice which exudes naturally as a result of the weight of the material.
Tar is prepared largely from P. sylvestris; it is chiefly obtained from the roots, which, mingled with a few logs, are arranged in a conical or funnel-shaped hollow made on the steep side of a hill or bank; after filling up, the whole is covered with turf and fired at the top, when the tar exudes slowly and runs into aniron vessel placed below, from the spout of which it is conveyed into barrels.
Krummholz oil, valued in Germany as an outward application in rheumatism and for bruises and sprains, is distilled from the young branches, and a fragrant white resin that exudes in some quantity from the buds is used for similar purposes and as a perfume, under the name of Hungarian balsam it is sold in the towns of Germany, being probably obtained from the Carpathians.
The wood is soft and nearly white, but contains much resin, which when fire has run through the forest exudes, and, having in this half-burnt condition a sweetish taste, has given the common name to the tree; the wood seems to be formed slowly; from its smooth grain it is valued for indoor carpentry; the saccharine burnt resin is used as a laxative in California.
Among the valuable vegetable products forming articles of export are various gums and dyes, the most important being gum tragacanth, which exudes from the astragalus plant in the hilly region from Kurdistan in the north-west to Kermn in the south-east.
As the juice exudes, more petals are pressed on to them with a cloth until a layer of sufficient thickness is obtained.
Tamarisk manna (Persian gaz-angubin, tamarisk honey) exudes in June and July from the slender branches of Tamarix gallica, var.
In the ear of rye that is infected with ergot a species of fermentation takes place, and there exudes from it a sweet yellowish mucus, which after a time disappears.
The fat gradually exudes and collects on the top of the water, whilst the membranous matter, "greaves," falls to the bottom.
The meal exudes and escapes from the press.
The acacias and the Rosaceae yield their gums most abundantly when sickly and in an abnormal state, caused by a fulness of sap in the young tissues, whereby the new cells are softened and finally disorganized; the cavities thus formed fill with liquid, which exudes, dries and constitutes the gum.
Gum tragacanth, familiarly called gum dragon, exudes from the stem, the lower part especially, of the various species of Astragalus, especially A.
When the milk-like juice (" spuma pinguis," Pliny) which exudes has hardened by exposure to the atmosphere, the incision is deepened.
Porter Smith, op. cit., p. 162.) Common frankincense or thus, Abietis resina, is the term applied to a resin which exudes from fissures in the bark of the Norway spruce fir, Abies excelsa, D.C.; when melted in hot water and strained it constitutes " Burgundy pitch," Pix abietina.
This is done by allowing the oil to cool down to a low temperature and pressing it through cloths in a press, when a limpid oil exudes, which remains proof against cold - "winter oil."
It is much employed for house-building; most of the picturesque log-houses in Vaud and the adjacent cantons are built of squared larch trunks, and derive their fine brown tint from the hardened resin that slowly exudes from the wood after long exposure to the summer sun; the wooden shingles, that in Switzerland supply the place of tiles, are also frequently of larch.
The latex, which exudes slowly and in many tortuous courses, some of it ultimately falling on the ground, is allowed to remain on the tree for several days, until it becomes dry and solid, when it is pulled off in strings, which are either rolled up into balls or put into bags in loose masses, in which form it enters commerce under the name of Ceara " scrap."