188 TETEEINAKT MATERIA MEDICA. 



flammation and symptoms of a violent character, as 

 strangury, bloody urine, etc., and therefore should be 

 used with caution. Diuretics are employed to remove 

 iluid from the tissues and cavities of the body in cases 

 of dropsy ; to promote the elimination of waste pro- 

 ducts and other poisons from the blood ; to maintain 

 the action of the kidneys ; and to dilute the urine and 

 alter morbid conditions of that excretion. 



PITCH, TAR, TURPENTINE, ETC. 



The turpentines are liquid or concrete oleoresinous 

 exudations, obtained from various species of the cone- 

 bearers or Coniferae, and consist of a resin combined 

 with an oily substance, known as the oil of turpen- 

 tine. 



The three chief turpentines are : 



Terebinthina, turpentine, a concrete oleoresin, ob- 

 tained from Pinus australis or yellow pine, and other 

 species of pinus (natural order Coniferse), in yellow- 

 ish, tough masses, brittle in the cold, crummy, crys- 

 talline in the interior, of a terebinthinate odor and 

 taste. Dose; as stimulant, antispasmodic, and diu- 

 retic, H. and C, ss.-iss. ; D., gr. | x.-xxx. ; as anthel- 

 mintic, H. and C, § i.-iij. ; D., gr. xx.- 3 i. 



Terebinthina Canadensis, Canada turpentine, 

 balsam of fir. A liquid oleoresin, obtained from 

 Abies balsamea, the " silver fir '' or " balm of Gilead," 

 natural order Coniferae. A yellowish or faintly 

 greenish, transparent, viscid liquid, of an agreeable 

 terebinthinate odor, and a bitterish, slightly acrid 



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