COMPOSIT#. 265 
igrensy, they do not afford relief to the dryness and 
nsion of the skin. The affected parts are rubbed night and, 
pain is soon relieved, and the eruptions disappear. 
4 Description.— A much branched, erect herb, I to 3 feet 
igh, with opposite, broadly triangular or ovate, coarsely tooth- 
then treated with alcohol, part of the alcohol distilled off, and 
the residue mixed with five or six times its volume of water, | 
slightly acidulated. The precipitated substance after filtration 
is treated with alcohol, and mixed with two or three times its 
volume of water, when the darutyne crystallizes out, the yield 
being 0°15 per cent. The crystals are soluble in alcohol and 
i. but insoluble in cold water, dilute acids, alkalies and 
chloroform and are neutral to test paper. M. Auffray finds 
that it does not give the reactions for glucosides, alkaloids, 
acids, or resin. Concentrated sulphuric acid dissolves the 
erystals with a brownish colour, and strong hydrochloric acid 
out colour in the cold, but when allowed to boil 
i —— tint, Be a 
