Odorographia : a natural history of raw materials and drugs used in the perfume industry : intended to serve growers, manufacturers and consumers . l. L, p. 370. Lavender. Investigations into the cliemical composition ofoil of lavender have been made by Bertram and Walbaum ;* bySemmler and Tiemann,f and by Bouchardat .^ also by & Co.,§ and Hirsehsohn. \[ The published results indicate that lavender oil contains, inaddition to the esters Linalool-acetate, Linalool-butyrate andGeraniol-acetate, large quantities of free Linalool, identical withLicareol. The determination of the es
Odorographia : a natural history of raw materials and drugs used in the perfume industry : intended to serve growers, manufacturers and consumers . l. L, p. 370. Lavender. Investigations into the cliemical composition ofoil of lavender have been made by Bertram and Walbaum ;* bySemmler and Tiemann,f and by Bouchardat .^ also by & Co.,§ and Hirsehsohn. \[ The published results indicate that lavender oil contains, inaddition to the esters Linalool-acetate, Linalool-butyrate andGeraniol-acetate, large quantities of free Linalool, identical withLicareol. The determination of the ester was made withoutdifficulty,*7 and is of great importance. A high proportion of esteris always a favorable sign, but even an oil with a low percentageof ester must still be considered good if it contains a large propor-tion of Linalool to make up this deficiency. An ascertainedquantity of oil is saponified with 20-30 c. c. m. of an alcoholicpotash-lye, and the excess of the potash employed determinedby titration with normal sulphuric acid. Seven experimentswith oil of the same sample of the Ijest quality gave the followingresults:—. * Journal fiir Praktische Chemie, 1892, xlv. t Ber. Deutsche Chem. Ges., 1892, xxv., p. t Comptes Rendus, cxvii., p. 53. § Bericht., April, , and Oct., 1893. I! Journ. fiir Pract. Chem., xlv. IT Schimmel in Journ. fiir Prakt. Chem., xlv , p. p. 594. LAVENDER. 427 Ester percentages of other lavender oils from various sourceswere found to be as follows :—30 per cent., 36 per cent, (in twocases), 33*8 per cent., 34*2 per cent., 39 per cent., 32-8 per cent.,307 per cent., and 31*5 per cent. (Pure oil from the dried flowersgave 22-2 per cent.). It follows therefore that 30-33 per cent,may be taken as a fair standard percentage for a good sample oflavender oil. In order to find out whether tlie ester-determination is reliablein the presence of large quantities of Turpentine oil, mixtures weremade of the latter oil with a lavender o
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectperfumes, bookyear189
