In the description of the Urceola elastica, or caout-chouc-vine, of Sumatra and Pulo Pinang, by Dr. W. Roxburgh, in the Asiatic Researches Volume 5 page 167, he says, "For the discovery of this useful vine we are, I believe, indebted to Mr. Howison, late surgeon at Pulo Pinang; but it would appear he had no opportunity of determining its botanical character. To Dr. Charles Campbell of Fort Marlborough we owe the gratification arising from a knowledge thereof. About twelve months ago I received from that gentleman, by means of Mr. Fleming, very complete specimens, in full foliage, flower, and fruit. From these I was enabled to reduce it to its class and order in the Linnean system. It forms new genus immediately after tabernaemontana, and consequently belongs to the class called contortae. One of the qualities of the plants of this order is their yielding, on being cut, a juice which is generally milky, and for the most part deemed of a poisonous nature." Of another plant, producing a similar substance, I received the following information from Mr. Campbell, in a letter dated in November, 1803: "You may remember a trailing plant with a small yellowish flower and a seed vessel of an oblong form, containing one seed; the whole plant resembling much the caout-chouc. To this, finding it wholly nondescript, I have taken the liberty to attach your name. It has no relationship to a genus yielding a similar substance, of which I sent a specimen to Dr. Roxburgh at Bengal, who published an account of it under the name of urceola. It is called jintan by the Malays, and of its three species I have accurately ascertained two, the jintan itam and jintan burong, the latter very rare. Its leaves are of a deep glossy green, and the flowers lightly tinged with a pale yellow; it belongs to the tetrandria, and is a handsome plant--but more of this with the drawing." Unfortunately however neither this drawing nor any part of his valuable collection of materials for improving the natural history of that interesting country, which he bequeathed to me by his will, have yet reached my hands. GUM. Mr. Charles Miller observed in the country near Bencoolen a gum exuding spontaneously from the paty tree, which appeared very much to resemble the gum-arabic; and, as they belong to the same genus of plants, he thought it not improbable that this gum might be used for the same purposes. In the list of new species by F. Norona (Batavian Transactions Volume 5) he gives to the pete of Java the name of Acacia gigantea; which I presume to be the same plant. PULSE.