Obtained from Pinus Picea. Contains about 35 per cent of Volatile Oil.

b. Terebinthina Canadensis. Canadian Balsam or Turpentine. Obtained from Abies Balsamea. Officinal. Contains about 18 per cent. of Volatile Oil. Source, Canada.

c. Terebinthina Chia. Chian, or Chio Turpentine.

Obtained from Pistacia Terebinthus. Nat. Ord. Tere-binthaceae. Source, Isle of Chio and Southern Europe.

d. Terebinthina Veneta seu Laricea. Venice Turpentine. Obtained from Larix EuropAea. Contains from* 18 to 25 per cent. of the Volatile Oil.

e. Terebinthina Vulgaris. Common Turpentine. Obtained from various species of Pinus. Contains from 5 to 25 per cent. of the Volatile Oil.

The above terebinthinates closely resemble each other in medicinal properties, being stimulant and diuretic, and exercising a powerful effect upon mucous membranes, particularly those of the genito-urinary organs. Their activity depends upon the Volatile Oil which they contain, those having the largest quantity being the most efficacious: but the Canada variety is often preferred on account of its less disagreeable flavour.

The dose is gr. xx. - gr. lx., in emulsion with yolk of egg or mucilage, or the softer kinds may be solidified by the addition of calcined Magnesia, and given in the form of a pill. They formerly entered into the composition of several officinal plasters and ointments.

Therapeutic Uses. Similar to those of Oleum TerebinthinAe, but much less certain and speedy in their operation.

2731. In Chronic Gleet, Chian Turpentine may sometimes be given internally with excellent effect. In Chronic Inflammation of the Prostate Gland, it is spoken of in the highest terms by Mr. Adams, who considers that it exercises a specific action on the prostatic part of the urethra, and on the gland itself.

* Edin. Med. Surg. Jouro., No. lv. p. 16.

On the Anatomy and Diseases of the Prostate Gland, 8vo, Lund. 1861.