386 JOURNAL OF THE SOCIETY OF COSMETIC CHEMISTS them myself from their distillation sites, I can vouch for their authenticity. Fig. 10 shows the relationship between the three most important oils from this genus with respect to their more volatile constituents. Oils of spike (a) (b) ... . (c) Figure 10 Comparative chromatograms of the more volatile constituents of oils of (a) lavender, (b) spike and (c) lavendin.

GAS-LIQUID CHROMATOGRAPHY AND THE PERFUMER 387 (Lavandula latifolia) and lavender (Lavandula vera) are composed in the main of the same compounds, though in very different proportions. Camphor, cineole and the early terpenes, for instance, are relatively minor constituents of oil of lavender, whereas oil of spike contains very little linalyl acetate. Lavendin is said to be a hybrid between these two species, and the chro- matogram of its oil is concordant with this parentage. The illustrated differences between the three oils are both consistent and characteristic. Several of the varieties of Lavandula, bred in France during recent years, have been planted and distilled on a large scale. The more important new (a) •...•/..• ..... .•- i!.•,.•--..•-,•..:•:-:••--•-.._.•••••-.- .,,, (b) Figure 11 Comparative chromatograms of two different oils of ordinary lavender.