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.