CALAMUS 537 



a haemostatic in metrorrhagia. Hydrastine is given to 

 horses as a bitter tonic in doses of gr.iii.-v.; and to 

 dogs in quantities of gr.^-J. Externally, the fluid extract 

 of hydrastis (1-8 to 1-2), or hydrastine (gr.v.- § i), in aqueous 

 sohition, are most serviceable as local stimulants in the 

 treatment of the subacute stages in inflammatory diseases of 

 mucous membranes, and in relaxed or atonic conditions of 

 these tissues. The solutions are applied as injections, or 

 lotions, in leucorrhoea, endometritis, balanitis, otorrhoea, 

 stomatitis, etc., and upon indolent ulcers. 



Calamus. Calamus. (U. S. P.) 



Synonym. — Sweet flag, radix acori, E.; rhizoma calami, 

 P.G.; acore vrai, acore odorant, Fr.; kalmuswurzel, G. 



The rhizome of Acorus Calamus Linne (nat. ord. 

 Aroidese.) 



Description.'— Jjo. sections of various lengths, unpeeled, 

 about 2 Cm. broad, subcylindrical, longitudinally wrinkled ; 

 on the upper surface marked with leaf scars forming triangles, 

 and on the lower surface with the circular scars of the root- 

 lets in wavy lines ; externally reddish-brown, somewhat 

 annulate from remnants of leaf-sheaths ; internally whitish, 

 of a spongy texture, breaking with a short, corky fracture, 

 showing numerous oil cells and scattered wood-bundles ; the 

 latter crowded within th6 subcircular endoderm. It has an 

 aromatic odor, and a strongly bitter taste. 



Gonstitiients. — 1, acorin (CgeHgoOg), a liquid, yellow gluco- 

 side having a bitter taste ; 2, a volatile oil, 1-2 per cent.; 3, 

 calamine ; 4, choline. 



I)ose.—K. & C, 5 i.-ii. (30.-60.); Sh. & Sw., 3 i.-iii. (4-12.); 

 D., gr.xv.-3i. (1.-4.). 



PREPARATION. 



Extractum Calami Fluidum. Fluid Extract of Calamus. (U. S. P.) 



Made by maceration, percolation and evaporation, so that 1 Cc. = 

 1 Gm. of the crude drug. 



