Arsenical Solution gives but a slight precipitate), mercuric chloride, tannic 

 acid, hypophosphites in acid mixture. 



x Liquor Arsenicalis. Arsenical Solution (Fowler's Solution). 

 Dose, 2-8 min.; 0.1-0.5. c.c. 



1; Potassium Carbonate, 1; Compound Tincture of Lavender, 3.125; 

 Water, to 100 

 A reddish liquid alkaline to litmus. 1 gr. in 110 min. 



Incompatibles, as an alkaline solution with acid solutions (Liquor 

 Strychninae, Liquor, and Tinctura Ferri Perchloridi, etc.) alkaloids and 

 most metals; see also above under Acidum Arseniosum. 



liquor Arsenici Hydrochloricus. Hydrochloric Solution of 

 Arsenic. Dose, 2-8 min.; 0.1-0.5 c.c. 



1; Hydrochloric Acid, 1.25; Water to 100. A colourless liquid with an 

 acid reaction. 1 gr. in 110 min. 



Incompatibles, as for arsenious and hydrochloric acids. 



3 Arsenii lodidum. Arsenious Iodide. Dose, 1/20-1/5 gr.; 

 3-12 mgms. 



Small orange crystals or crystalline masses. Soluble in water and in al- 

 cohol. 



Incompatibles, see above and as for any soluble iodide. 



x Liquor Arseniitt Hydrargyri lodidi. Solution of Arsenious and 

 Mercuric Iodides. (Donovan's Solution.) Dose, 5-20 min.; 0.3-1.2 c.c. 

 1; Mercuric Iodide, 1; Water, to 100. A clear, pale yellow liquid with 

 a metallic taste. 1 gr. of each in 110 min. Incompatible with all alkaloids. 



3 Ferri Arsenas. Dose 1/16-^gr.: 4-6 mgms (See p. 59). 



3 Sodii Arsenas. Dose 1/40-1/10 gr. : 1-6 mgms. (See p. 94). 



3 Liquor Sodii Arsenatis. Dose 2-8 min.: 0.1-0.8 c.c. (see p. 94) 



ASAFETIDA. ASAFETIDA. Dose, 5-15 grs. ; 3-10 dgms. 

 A gum resin obtained from the root of Ferula fetida. Flattened tears 

 or masses of tears, dull yellow in colour, darkening on keeping,but yellowish 

 or milky white within; odour strong alliaceous and persistent; taste bitter, 

 acrid and alliaceous. Forms a white emulsion when triturated with water; 

 injpart soluble in alcohol. 



3 Tinctura Asafetidae. Dose, 30-60 min. ; 2-4 c.c. 

 20; Alcohol ;70% to 100: by maceration. 

 Pilula Aloes et Asafetidae, see Aloe. 



Atropina, see Belladonna, (p. 40). 



AURANTII CORTEX RECENS. Fresh Bitter Orange Peel. The fresh 

 outer part of Citrus Aurantium var. Bigaradia. 



: Tinctura Aurantii. Dose, 30-60 min.; 2-4 c.c. 

 25; Alcohol, to 100. 



^yrupus Aurantii. Dose, 30-60 min. ; 2-4 c.c. 

 12.5; Syrup, 87.5. 



38 



