The moisture content of the owers was determined by
drying in an oven at 50 C until no further change in
weight was observed
The density of the essential oil
was determined by using an Anton Parr Model DMA
48, its refractive index by using a Shimadzu Bausch and
Lamb Abbe Refractometer, and its optical rotation by
using a Bellingham and Stanley Digital Polarimeter
Model P20.
The oil was obtained from fresh ¯owers by hydro-
distillation in a Neo-Clevenger apparatus for 5±6 h.