AND PHARMACOPCEIA. 651 



One ounce, or one ounce and i\ half, being boiled in three 

 pints of water to one pint and a half, Avitli a little cassia and 

 caraway seeds, makes one dose, which may be repeated if ne- 

 cessary. 



TRAGACANTH GUM; or GUM DRAGON.— ^^^m- 

 ffalns verus. The shrub from which this gum is obtained is a 

 native of Persia. When good, tragacanth should be whitish, semi- 

 transparent, inodorous, and leaving a slightly bitter taste in the 

 mouth when chewed. Its properties are demulcent, and, as it 

 yields a strong mucilage, it may be employed instead of gum 

 arabic in the foi'mation of emollient drinks. 



TKAUMATIC, or FRIAR'S BALSAM.— Tmc^«m Ben- 

 zaini Comjjosita. Traumatic balsam is the compound tincture of 

 benzoin, and is made in the following manner: — 



Benzoin ,.c 3 ozs. 



Strained storax balsam 2 ozs. 



Balsam of tolu 1 oz. 



Extract of spiked aloes ^ oz. 



Rectified spirit 1 qt. 



Digest for fourteen days, and filter or strain. 



As the name of this balsam implies, it is generally employed 

 as an application to wounds which require a slight stimulus. It 

 is rarely prescribed as an internal remedy, although it has been 

 deemed useful in chronic cough, and some other pulmonary af- 

 fections. As it is decomposed by water, it must, when adminis- 

 tered internally, be first triturated with mucilage or yolk of egg, 

 in order to suspend it in aqueous fluids. See Benzoin. 



TRITICUM; FARINA; AMYLUM. Wheat; wheat- 

 flour ; starch. Wheat is never given to horses as food in this 

 country, both on account of its price, and because it is apt to 

 produce colic. Wheat-flour gruel is occasionally given in diar- 

 rhoea, and starch is sometimes used in the composition of clysters 

 in the same disease. 



TURNIPS. Boiled turnips make an excellent poultice for 

 the heels when aftected with grease. 



TURPENTINE.— Terei"m^/<ma. This term is applied to 

 the resinous juices of certain trees. There are four kinds, viz, 

 Chio, Strasburgh, Venice, and common turpentine; the two last 

 only are employed in veterinary medicine. They are effectual 

 diuretic. , and possess a considerable carminative power. Com- 

 mon turpentine is a principal ingredient in digestive and deter- 

 gent ointments. 



In speaking of the turpentines. Dr. Paris says, they all possess 

 the same chemical as well as medicinal properties ; viz. Canada 

 turpentine, or Canada balsam, as it is sometimes improperly 

 called, is obtained from the Pinus Balsamea. 2dly, Chian or 



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