H'ARTSHORN, noun The horn of the hart or male deer. The scrapings or raspings of this horn are medicinal, and used in decoctions, ptisans, etc. hartshorn jelly is nutritive and strengthening. hartshorn calcined by a strong and long continued heat, is changed into a white earth, which is employed in medicine as an absorbent. The salt of hartshorn is powerful sudorific, and hartshorn yields also a pungent volatile spirit.

The jelly of hartshorn is simply gelatine; the earth remaining after calcination, is phosphate of lime; the salt and spirit of hartshorn are muriate of ammonia, with a little animal oil.

Hartshorn plantain, a species of Plantago.