Chemistry of Essential Oils

44 THE CHEMISTEY OF ESSENTIAL OILS

odour recalling that of menthene. It is probable that a second hydro-
carbon of the formula C 10 H 18 is also present. The oil itself has the fol-
lowing characters :—

Specific gravity at 22°

Kefractive index 1

Optical rotation.

0-S058

1-4670

+ 3-2°