All portions of this petroleum contain saturated carbides of the formula C_nH_{2n}, which the authors name paraffenes. At a bright red heat they yield benzinic carbides, C_nH_{2n-6}, naphthalin and a little anthracen. At dull redness the products are along with unaltered paraffenes, products which unite energetically with bromine, and which are converted into resinous polymers of ordinary sulphuric acid. It is difficult to isolate, by means of fractional distillation, definite products with constant boiling points. * * * * * NOTES ON CANANGA OIL OR ILANG-ILANG OIL. [Footnote: From the _Archiv der Pharmacie_.] By F. A. FLÜCKIGER. This oil, on account of its fragrance, which is described by most observers as extremely pleasant, has attained to some importance, so that it appears to me not superfluous to submit the following remarks upon it and the plant from which it is derived. The tree, of which the flowers yield the oil known under the name "Ilang-ilang" or "Alanguilan," is the _Cananga odorata_, Hook. fil. et Thomp.,[1] of the order Unonaceæ, for which reason it is called also in many price lists "Oleum Anonæ," or "Oleum Unonæ" It is not known to me whether the tree can be identified in the old Indian and Chinese literature.[2] In the west it was first named by Ray as "Arbor Saguisan," the name by which it was called at that time at Luçon[3] Rump[4] gave a detailed description of the "Bonga Cananga," as the Malays designate the tree ("Tsjampa" among the Javanese); Rumph's figure, however is defective. Further, Lamarck[5] has short notices of it under "Canang odorant, _Uvaria odorata_." According to Roxburgh,[6] the plant was in 1797 brought from Sumatra to the Botanical Gardens in Calcutta. Dunal devoted to the _Ucaria odorata_, or, properly, _Unona odorata_, as he himself corrected it, a somewhat more thorough description in his "Monographic de la Famille des Anonacees,"[7] which principally repeats Rumph's statements. [Footnote 1: "Flora Indica," i (1855), 130.] [Footnote 2: "No mention of any plant or flowers, which might be identified with Cananga, can be traced in any Sanskrit works."--Dr. Charles Rice, _New Remedies_, April, 1881, page 98.] [Footnote 3: Ray. "Historia Plantarum, Supplementum," tomi i et ii "Hist. Stirpium Insulæ Luzonensis et Philippinarum" a Georgio Josepho Canello; London, 1704, 83] [Footnote 4: "Herbarium Amboinense, Amboinsch Kruidboek," ii. (Amsterdam, 1750), cap. xix, fol. 195 and tab. 65.] [Footnote 5: "Encyclopédie méthodique. Botanique," i (1783), 595.] [Footnote 6: "Flora Indica," ii. (Serampore, 1832), 661.] [Footnote 7: Paris, 1817, p. 108, 105.]