Camphene

Chambers's Encyclopaedia, Volume 2: Beaugency to Cataract, p. 687

Camphene, or CAMPHILENE, is an artificial variety of camphor obtained from turpentine, by acting thereon with the dry vapour of hydrochloric acid, and keeping the whole at a low temperature by immersing the vessel in a freezing mixture. A solid substance is produced, which separates in white crystalline prisms, and has the taste and agreeable aromatic smell of common natural camphor. The name Camphene has, however, a wider signification, being applied to the whole class of oils isomeric with turpentine, of which the best known are the oils of bergamot and lemon.

Source scan(s): p. 0700