The oil is thick and very pungent: Cubebs oil.
III. The oil dissolves iodine without vigorous reaction and without an increase in the temperature.
a. The oil is blue and green.
It has an agreeable, camphor-like odor: Camomile oil.
The green oil thickens in the air and is dextrorotatory: Wormwood oil.
The oil is generally green and produces no effect upon the plane of polarization: Cajeput oil.
b. The oil is colorless or yellow-brown.
α. It separates a solid stearoptene at about 32° F.: Rue oil.
β. The oil remains liquid at several degrees below 32° F.
1. Dextrorotatory oils.