36 



taste, dissolves little in water, readily in etlier, alcohol, oil of 

 turpentine and alkalies. Capsicum contains also a crystalline- 

 resin, which, perhaps, is Capsicin in a purer state, and does not 

 dissolve in water and ether. 



Capsulvescic Acid =026 H12 Oie. (Might be called ^sculic 

 acid. — F. V. M.). In the capsules of the ripe fruit of ^sculus Hip- 

 pocastanum. Sublimates undecomposed ; isomeric with triacetyl- 

 gallic acid, behaves like the latter towards salts of oxyd of iron, 

 and likewise reddens the solution of caustic potash. 



CarailHil- Exudation of the stem of Bursera gummifera. 

 Dark-brown or green-brown, transparent at the edges, viscous, or 

 solid and brittle, smells faintly like ammoniacum, of a bitter taste, 

 and, when warmed, of a pleasant, balsamic odour, fuses readily. 

 Contains 96% resin, which readily dissolves in alcohol, ether and 

 alkalies. 



Csirai)ill. Bitter substance of the bark of Carapa Guianensis. 

 Is very similar to cailcedrin and tulucunin, and also prepared in 

 a like manner. Amorphous, resinous, readily soluble in alcohol 

 and chloroform, less so in ether and water. It differs from 

 tulucunin by striking no decided colour with acids. It consists of 

 55-04C, 6-54H and 38420. 



Car(lol = C42 H30 O4. The acrid, oily ingredient of the peri- 

 carp of Anacardium occidentale, Semecarpus Anacardium and of 

 several other species of both genera. Free the nuts from 

 the mild oily seeds, contuse the pericarp, exhaust with ether, 

 distil off the latter, and free the residue from tannic acid 

 by washing with water. Dissolve the remaining mixture, 

 of about 90% anacardic acid, 10% Cardol, and a little of 

 an ammonia compound in 15 to 20 parts alcohol, digest 

 the solution with freshly-precipitated hydrated oxyd of lead, 

 whereby ammonia is evolved and a violet compound of lead is 

 precipitated; filter again, and distil off the alcohol. Cardol of 

 a dark claret colour remains behind, the slightly-concentrated 

 alcoholic solution of which is mixed with water to turbidness and 

 afterwards with an aqueous solution of acetate of lead, boiled and 

 decolourised by adding subacetate of lead in minute quantities, 

 whereby a brown, sticky precipitate is formed. The lead is 

 removed from the solution by means of sulphuric acid, the 

 alcohol distilled off, and the remaining Cardol washed with 

 water. — Yellow, in thicker layers reddish oil of 0-978 density at 

 23°, without smell in the cold, when warm of a faint, pleasant 

 odour, neutral, irritates the skin and raises blisters; does not 

 volatilise without decomposition; insoluble in water, readily soluble 

 in alcohol and ether, burns with a bright but very sooty, smoking 

 ilame dissolves in concentrated sulphuric acid with red colour. 



