_The Egg of the Domestic Fowl._
VITELLUS, The _Yolk_ or _Yelk_, is principally employed in
pharmaceutical operations, for rendering oils and balsams miscible with
water. It is gently laxative.
_Oleum e vitellis_, Oil of Eggs. Obtained by boiling the yelks, and then
submitting them to pressure; fifty eggs yield about 5 oz. of oil. It is
introduced into the Paris Pharmacopœia, being much employed on the
Continent for _killing_ mercury.
ALBUMEN. Used principally for clarifying turbid liquors.
TESTA. Similar to other absorbents.