2. Spirits of hartshorn (see below); volatile salts.
{Hartshorn plantain} (Bot.), an annual species of plantain
({Plantago Coronopus}); -- called also {duck's-horn}.
--Booth.
{Hartshorn shavings}, originally taken from the horns of
harts, are now obtained chiefly by planing down the bones
of calves. They afford a kind of jelly. --Hebert.
{Salt of hartshorn} (Chem.), an impure solid carbonate of
ammonia, obtained by the destructive distillation of
hartshorn, or any kind of bone; volatile salts. --Brande &
C.
{Spirits of hartshorn} (Chem.), a solution of ammonia in
water; -- so called because formerly obtained from
hartshorn shavings by destructive distillation. Similar
ammoniacal solutions from other sources have received the
same name.