^laterinum. Elaterin. Dose, 1/40-1/10 gr.; 2-6 mgms. 

 The active principle of elaterium. Small scales, with a bitter taste In- 

 soluble in water, or glycerin, soluble 1 in 160 of cold alcohol, readliy in 

 hot; or in chloroform or solutions of the alkalies. 



2 Pulvis Elaterini Compositus. Dose, 1-4 grs.; X~2> dgms. 

 2.5; Milk Sugar, 97.5. 



Emplastra. (see Ammoniacum, Belladonna, Cantharis, Hydrar- 

 gyrum, Menthol, Opium, Fix, Plumbum, Resina, Sapo). 



ERGOTA. ERGOT. Dose, 20-60 grs.; 12-40 dgms. 



The dried sclerotium of the fungus, Claviceps purpurea, originating in 

 the ovary of Secale cereale, the rye. Roughly cylindrical, dark, violet- 

 black grains, with tapering ends, from 1/3- 1> inch in length; pinky white 

 within ; odour peculiar; taste disagreeable. Deteriorates rapidly on keeping 

 especially if not kept absolutely dry. Active principles are the alkaloid 

 ergotoxine and certain amido-acids e. g. parahydroxyphenylethylamin- 

 (see p. 106). 



^xtractum Ergotae. (Ergotin.) Dose, 2-8 grs.; 1-5 dgms. 

 A soft alcoholic extract. 



x lnjectio Ergotse Hypodermica. Dose, 3-10 min.; 0.2-0.6 c.c. 

 30; Phenol, 0.9; Water to 100. 3 grs. in 10 min. 



^xtractum Ergotse Liquidum. Dose, 10-30 min.; 0.6-2 c.c. 

 An aqueous extract with alcohol added. 



3 Infusum Ergotae. Dose, 1-2 fl. oz.; 30-60 c.c. 

 5; boiling Water 100. 



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

 25; Solution of Ammonia, 10; Alcohol 60% to 100: by percolation. 



EUCALYPTI GUMMI. Dose, 2-5 grs.; 1-3 dgms. 



A ruby-coloured exudation from the bark of Eucalyptus rostrata, and 

 probably other species. In grains or small masses; thin fragments are 

 transparent and of a ruby or garnet-red colour; taste astringent, and tinges 

 the saliva red. About 80-90% soluble in water, almost entirely soluble 

 in alcohol. 



3 Trochiscus Eucalypti Gummi. 1 gr. with the Fruit Basis. 



OLEUM EUCALYPTI. Dose, >^-3 min.; 0.03-0.2 c.c. 



The oil distilled from the fresh leaves of Eucalyptus Globulus, and other 

 species. Colourless or pale yellow, with an aromatic camphoraceous 

 odour, and a pungent taste, leaving a sensation of coldness in the mouth. 



2 Unguentum Eucalypti. 10 by weight; Hard Paraffin, 40; Soft 

 Paraffin, 50. 



57 



