I beg your acceptance of a piece of camphor-wood, the genuine quality of which I can answer for, being cut by one of my own people, who was employed in making charcoal, of which the best for smiths' work is made from this wood. On cutting deep into a pretty large tree the fine oil suddenly gushed out and was lost for want of a receiver. He felled the tree, and, having split it, brought me three or four catties (four or five pounds) of the finest camphor I ever saw, and also this log, which is very rich. My reason for being thus particular is that the country people have a method of pouring oil of inferior camphor-trees into a log of wood that has natural cracks, and, by exposing this to the sun every day for a week, it appears like genuine camphor; but is the worst sort.
This coexistence of the two products has been since confirmed to me by others, and is particularly stated by Mr. Macdonald in his ingenious paper on certain Natural Productions of Sumatra, published in the Asiatic Researches Volume 4 Calcutta 1795. It seems probable on the whole that, as the tree advances in age, a greater proportion of this essential oil takes a concrete form, and it has been observed to me that, when the fresh oil has been allowed to stand and settle, a sediment of camphor is procured; but the subject requires further examination by well-informed persons on the spot.
PRICE.
Head camphor is usually purchased from those who procure it at the rate of six Spanish dollars the pound, or eight dollars the catty, and sells in the China market at Canton for nine to twelve dollars the pound, or twelve to fifteen hundred dollars the pekul of a hundred catties or one hundred thirty-three pounds and a third, avoirdupois. When of superior quality it sells for two thousand dollars, and I have been assured that some small choice samples have produced upwards of thirty dollars per catty.* It is estimated that the whole quantity annually brought down for sale on the western side of the island does not exceed fifty pekul. The trade is chiefly in the hands of the Achinese settled at Sinkell, who buy the article from the Batta people and dispose of it to the Europeans and Chinese settlers.
(*Footnote. See Price Currents of the China trade. Camphor was purchased in Sumatra by Commodore Beaulieu in 1622 at the rate of fifteen Spanish dollars for twenty-eight ounces, which differs but little from the modern price. In the Transactions of the Society at Batavia it appears that the camphor of Borneo sells in their market for 3200 rix dollars, and that of Japan for 50 rix dollars the pekul.)
JAPAN CAMPHOR.
It has been commonly supposed that the people of China or Japan prepare a factitious substance resembling native camphor, and impregnated with its virtues by the admixture of a small quantity of the genuine, which is sold to the Dutch factory for thirty or forty dollars the pekul, sent to Holland, and afterwards refined to the state in which we see it in our shops, where it is sold at eight to twelve shillings the pound. It appears however an extraordinary circumstance that any article could possibly be so adulterated, bearing at the same time the likeness and retaining the sensible qualities of its original, as that the dealers should be enabled, with profit to themselves to resell it for the fiftieth part of the price they gave. But, upon inquiry of an ingenious person long resident in China, I learned that the Japan camphor is by no means a factitious substance, but the genuine produce of a tree growing in abundance in the latter country, different in every character from that of Sumatra or Borneo, and well known to our botanists by the name of Laurus camphora, L. He further informed me that the Chinese never mix the Sumatran camphor with that from Japan, but purchase the former for their own use, at the before-mentioned extravagant price, from an idea of its efficacy, probably superstitious, and export the latter as a drug not held in any particular estimation. Thus we buy the leaves of their tea-plant at a high rate and neglect herbs, the natives of our own soil, possessing perhaps equal virtues. It is known also that the Japan camphor, termed factitious, will evaporate till it wholly disappears, and at all stages of its diminution retain its full proportion of strength; which does not seem the property of an adulterated or compounded body. Kaempfer informs us that it is prepared from a decoction of the wood and roots of the tree cut into small pieces; and the form of the lumps in which it is brought to us shows that it has undergone a process. The Sumatran sort, though doubtless from its extreme volatility it must be subject to decrease, does not lose any very sensible quantity from being kept, as I find from the experience of many years that it has been in my possession. It probably may not be very easy to ascertain its superiority over the other in the materia medica, not being brought for sale to this country, nor generally administered; but from a medical person who practised at Bencoolen I learned that the usual dose he gave was from half a grain to one or two grains at the most. The oil, although hitherto of little importance as an article of commerce, is a valuable domestic medicine, and much used by the natives as well as Europeans in cases of strains, swellings, and rheumatic pains; its particles, from their extreme subtlety, readily entering the pores. It undergoes no preparation, and is used in the state in which, upon incision, it has distilled from the tree. The kayu putih (Melaleuca leucadendron) oil, which is somewhat better known in England, is obtained in the same manner; but to procure the meniak kayu or common wood-oil, used for preserving timber or boards exposed to the weather, from decay, and for boiling with dammar to pay the bottoms of ships and boats, the following method is practised. They make a transverse incision into the tree to the depth of some inches, and then cut sloping down from the notch, till they leave a flat superficies. This they hollow out to a capacity to receive about a quart. They then put into the hollow a bit of lighted reed, and let it remain for about ten minutes, which, acting as a stimulus, draws the fluid to that part. In the space of a night the liquor fills the receptacle prepared for it, and the tree continues to yield a lesser quantity for three successive nights, when the fire must be again applied: but on a few repetitions it is exhausted.
BENZOIN.
Benzoin or Benjamin (Styrax benzoin*) called by the Malays kaminian, is, like the camphor, found almost exclusively in the Batta country, to the northward of the equator, but not in the Achinese dominions immediately beyond that district. It is also met with, though rarely, south of the line, but there, either from natural inferiority or want of skill in collecting it, the small quantity produced is black and of little value. The tree does not grow to any considerable size, and is of no value as timber. The seeds or nuts, which are round, of a brown colour, and about the size of a moderate bolus, are sown in the padi-fields and afterwards require no other cultivation than to clear away the shrubs from about the young plants. In some places, especially near the sea-coast, large plantations of it are formed, and it is said that the natives, sensible of the great advantage accruing to them from the trade, in a national point of view, oblige the proprietors, by legal regulation, to keep up the succession.