co Re A COMPENDIUM OF 
OLEA FIXA—FIXED OILS. 
——_ 
Oxea Fixa, Fixed Oils; also known as Fatty 
Oils.—Like the volatile, they exist both in 
liquid and solid form. The vegetable oils are 
divided into the drying and non-drying, and 
these are again divided into groups—the Olive 
Oil group, the Cottonseed Oil group, Linseed 
Oil group, Castor Oil group, Whale Oil group, 
Lard Oil group, Tallow group {solid fat oils), 
and the Spermaceti group, which latter sub- 
stance is placed under the head of waxes, This 
group differs from the true fixed oils and fats 
by not yielding glycerine when saturated with 
the alkalies of potassium and sodium. The 
fixed oils of vegetable origin are mostly ob- 
tained by cold process—that is by a powerful 
pressure; whilst those of animal origin are ob- 
tained by heat, directly or indirectly applied. 
All the fixed oils in their natural state, whether 
they be of animal or vegetable origin, consist 
of two or more distinct ingredients of an oleag- 
