When the trees have attained the age of about seven years, and are six or eight inches in diameter, incisions are made in the bark, from whence the balsam or gum (as it is commonly termed, although being soluble in spirits and not in water, it is rather a resin) exudes, which is carefully pared off. The purest of the gum, or Head benzoin, is that which comes from these incisions during the first three years, and is white, inclining to yellow, soft, and fragrant; after which it gradually changes to the second sort, which is of a reddish yellow, degenerating to brown; and at length when the tree, which will not bear a repetition of the process for more than ten or twelve years, is supposed to be worn out, they cut it down, and when split in pieces procure, by scraping, the worst sort, or Foot benzoin, which is dark coloured, hard, and mixed more or less with parings of the wood and other impurities. The Head is further distinguished into Europe and India-head, of which the first is superior, and is the only sort adapted to the home market: the latter, with most of the inferior sorts, is exported to Arabia,* Persia, and some parts of India, where it is burned to perfume with its smoke their temples and private houses, expel troublesome insects, and obviate the pernicious effects of unwholesome air or noxious exhalations; in addition to which uses, in the Malayan countries, it is always considered as a necessary part of the apparatus in administering an oath. It is brought down from the country for sale in large cakes, called tampang, covered with mats; and these, as a staple commodity, are employed in their dealings for a standard of value, to which the price of other things have reference, as in most parts of the world to certain metals. In order to pack it in chests it is necessary to soften the coarser sorts with boiling water; for the finer it is sufficient to break the lumps and to expose it to the heat of the sun. The greater part of the quantity brought to England is re-exported from thence to countries where the Roman Catholic and Mahometan religions prevail, to be there burnt as incense in the churches and temples.** The remainder is chiefly employed in medicine, being much esteemed as an expectorant and styptic, and constitutes the basis of that valuable balsam distinguished by the name of Turlington, whose very salutary effects, particularly in healing green and other wounds, is well known to persons abroad who cannot always obtain surgical assistance. It is also employed, if I am not misinformed, in the preparation of court sticking-plaster. The gum or resin called dulang is named by us scented benzoin from its peculiar fragrance. The rasamala (Lignum papuanum of Rumphius, and Altingia excelsa of the Batavian Transactions) is a sort of wild benzoin, of little value, and not, in Sumatra, considered as an object of commerce.