METHODS OF OIL EXTRACTION ~ Books of Shadows

METHODS OF OIL EXTRACTION

Oil of Aniseed
Oil of Ben, or Behen
Birch Oil
Oil of Gum-benzoin
Cajeput Oil
Oil of Caraway
Oil of Cloves
Oil of Cassia
Oil of Chamomile
Oil of Cinnamon

Essence of Cedrat
Common Essence of Cedrat

Oil of Calamus
Oil of Cedar

Camphor
Camphor from Essential Oils

Dippel's Oil

Oil of Bitter Almonds
Artificial Oil of Bitter Almonds

Oil of Geranium
Artificial Oil of Geranium

Krumholz' Oil
Foreign Oil of Lavender
Essence of Lavender
Oil of Lemon
Oil of lemon-grass
Oil of Marjoram

Oil of Meadow Sweet
Artificial Oil of Meadow Sweet

Oil of Mint
Essence of Neroli
Oil of Nutmegs
Oil of Patchouly
Oil of Peppermint
Oil of Pennyroyal
Oil of Pimento
Oil of Rhodium
The True Riga Balsam
Butter of Roses
Oil of Rosemary
Oil of Rue
Oil of Sassafras
Oil of Sandal Wood
Oil of Spearmint
Oil of Tar
Oil of Thyme
Oil of Tongua

Oil of Turpentine
To Rectify Oil of Turpentine
Balsam of Turpentine, or Dutch-drops

Essence of Vitivert
Oil of Wintergreen
Oil of Wormwood

Adulterations of Volatile Oils
The most common are resinous matters, fixed oils,
the cheaper volatile oils, and alcohol.
Resinous and fatty matters are left behind
when the oil is evaporated;
the latter communicate a greasy stain to paper
which does not disappear with a gentle heat, and are
comparatively insoluble in alcohol.
Both are left behind when the oil is mixed
with water and distilled.

The cheaper volatile oils are detected
by the smell and taste, and specific gravity.
Oil of turpentine (often used) may be detected by it being
undissolved when the oil is treated with 4 times
its volume of alcohol of a specific gravity of 0.84.
Oil of geranium in oil of rose (a very common adulteration)
is detected by sulphuric acid, which develops
an unpleasant odor if the geranium oil be present,
but has no effect upon pure oil of rose.

Alcohol is largely used in adulteration.
Take some small pieces fused chloride of calcium
in the bottom of a test tube, add the oil
to be examined, and heat gently to 212° Fahr.
If much alcohol be present the chloride of calcium will be
dissolved, if only a small quantity the fragments will
fall together and form a pasty mass at the bottom of the tube.

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