44 



pour off tlie liquid, boil the residue with several changes of 

 alcohol, leave the alcoholic liquids to stand in the cold, strain off 

 from the crystals of saltpetre, distil the alcohol and allow the 

 residue, concentrated to a syrup-like consistence, to stand cold for 

 a few days. The Ch., which will then have separated in granular 

 crystals, must be collected, agitated with ether and recrystallised 

 in boiling alcohol. — White, lustreless, permanent powder, under 

 the microscope, of the appearance of concentrically united needles, 

 without taste or smell; it loses nothing of its weight at 100°, 

 begins to sublimate at 200° in snow-white crystalline flocks, 

 sublimates completely at 225°, becomes liquid, begins to boil and 

 evolves a very penetrating nauseous odour. It dissolves in 11 

 parts cold and in 3 to 4 parts boiling water, in 202 parts cold and 

 in 77 parts boiling alcohol of 90%, is of neutral reaction; 

 dissolves readily in diluted acids ; the chloride crystallises in cubes 

 and is precipitated with a light-yellow colour by chloride of 

 platinum. 



Cherry CJllin. Exudation of the stems and branches of Prunus 

 Amygdalus, P. Persica, P. Cerasus, P. domestica and P. Ai'me- 

 niaca. It is a mixture of about equal pai'ts of arabin and cerasin 

 (compound of the metagummic acid = C12 Hn On with lime) ; and 

 leaves the cerasin when treated with cold water as a colourless, 

 pellucid easily friable mass, which swells up in cold water without 

 dissolving, and is insoluble in alcohol. 



ClliCil Red = Cie Hg O e . In the Chica or Carajuru, a pigment 

 obtained from the leaves of Bignonia Chica in South America. 

 Digest the chica with alcohol acidulated with sulphuric acid, 

 neutralise the extract with carbonate of ammonia, wash the pre- 

 cipitate with boiling water and dry at 1'00°. It turns brown at 

 the light, is not soluble in water, readily so in alcohol with ruby- 

 red colour, little in ether with yellow, in alkalies with dirty-red 

 colour and precipitable by acids. 



Clliiuapllilill. Yellow, crystalline compound in Pyrola (Chima- 

 phila) umbellata. Agitate with chloroform the tincture of the 

 herb prepared with diluted alcohol, let subside, throw away the 

 upper stratum and allow the liquid beneath to evaporate; the 

 substance, which will separate, has to be recrystallised in alcohol. 

 In the purest state it is to be obtained by distilling the herb with 

 water. The stalks yield more of it than the leaves. — Beautiful, 

 gold-yellow, long needles, without smell or taste, fusible, sublimate 

 unaltered; almost entirely insoluble in water, soluble in alcohol, 

 ether, chloroform, in fixed and in volatile oils; is carbonised by 

 concentrated sulphuric acid, not altered by concentrated nitric or 

 hydrochloric acids. The alcoholic solution is not affected by tannic 

 acid or chloride of mercury. 



Cliiiiaiuiu - QuiNAMiN. 



