ARSENIC. 613 



Arnioa 



is internally a useful stimulant. It appears to have a special 

 action io increasing the circulation of blood in the surface of tlie 

 body. Dose of the tincture, 1 to 2 oz. in a pint of water. 



Arsenic 



is an alterative and tonic. Its good effects, when given 

 internally, are well marked in skin diseases and in surra. As 

 a rule, it should not be given continuously for more than ten 

 days at a time; as it accumulates in the system, and may tend 

 to cause corrosion of the coats of the stomach and intestines. 

 Externally, it is used as a caustic. 



For treatment of arsenical poisoning, see p. 590. 



Dose, usually 5 grains ; in surra, up to 20 grains. 



Arsenic is most conveniently given in the form of liquor arseni- 

 calis, which contains 4 grains to the ounce. 



Atropine 



is the active principle of belladonna. One-third to 1 grain of the 

 sulphate of atropine, dissolved in water, may be injected sub- 

 cutaneously (p. 644). The liquor atropince sulpliatis which is sold 

 by chemists, contains one grain of atropine sulphate in 100 minims. 



Beer. 



See " Ale." 



Belladonna. 



See pp. 338 and 430. Externally, a mixture composed of extract 

 of beUadonna and glycerine — of the consistency of thick cream — is 

 a useful application for recent sprains. 



Blisters. 



See " Cantharides '' (p. 614) and " Mercury, Biniodide of " 

 (p. 632). 



Boric Acid {Boracic Acid). 



See p. 68. Antiseptic ootton-wool is made by steeping cotton- 

 wool in boiling water which has as much boric acid in it as it will 

 dissolve ; then taking out the cotton-wool and drying it. 



