'Liquor Atropinae Sulphatis. Dose, tf-l min.; 0.03-6.06 c.c. 

 1 ;Salicylic Acid, 1.12; Water, to 100. 1 gr. in 110 min. 



lamellae Atropinae. Gelatin disks each containing 1/5000 gr. 



Benzoinum. Benzoin. A balsamic resin obtained from Styrax 

 Benzoin, and probably other species. Flat or curved tears varying in 

 size but seldom exceeding two inches in length and half an inch in thickness, 

 yellowish or reddish-brown in colour externally, milky white internally, 

 brittle when cold, softens when warmed and when heated emits fumes of 

 benzoic acid: the tears may occur in agglutinated masses. Insoluble in 

 water; soluble in alcohol . 



Important active constituent, benzoic acid. 



: Adeps Benzoatus. Benzoated Lard. 3r Lard, 100. 



: Tinctura Benzoini Composita. (Friar's Balsam.) Dose, 30- 

 60 min.; 2-4 c.c. 



10; Storax, 7.5; Balsam of Tolu, 2.5; Socotrine Aloes, 1.83; Alcohol, to 

 100. 



ACIDUM BENZOICUM. Dose, 5-15 grs.; 3-10 dgms. 



Light colourless, crystalline scales or needles; odourless, or with a slight 

 balsamic odour. Soluble, 1 in 390 of cold, 1 in 17 of boiling water; 1 in 

 3 of alcohol; and in ether, chloroform, fixed and volatile oils. 



Incompatibles of benzoic acid and benzoates, silver, mercury, lead, 

 and ferric salts in solution, quinine bisulphate; strong acids (free benzoic 

 acid from benzoates leading to a precipitate if in strong solution) ; benzoic 

 acid frees carbonic acid from carbonates. 



3 Trochiscus Acidi Benzoici. Y-I gr. in lozenge made with the 

 Fruit Basis. 



Ammonii Benzoas (see Ammonium, p. 34). 

 Sodii Benzoas (see Sodium, p. 94.) 



Benzol. A mixture of hydrocarbons containing about 70% of 

 benzene, and 20-30% of toluene. A colourless, volatile, inflammable 

 liquid, with a characteristic odour. 



Bismuthum. Bismuth. 



^ismuthi Carbonas. Bismuth Oxycarbonate. Dose, 5-20 grs.; 

 3-12 dgms. 



(Bi 2 O2CO 3 )2 H 2 O. A heavy white crystalline powder, faintly acid. In- 

 soluble in water. 



3 Trochiscus Bismuthi Compositus. 2 jgr.; Precipitated Cal- 

 cium Carbonate, 4 gr.; Heavy Magnesium Carbonate, 2 gr.; with the Ros- 

 Basis. 



41 



