200 



soda, evaporated to dryness, and the i-emaining salt distilled with 

 suliihuric or better pliosplioric acid, when Salicylous acid passes over 

 first and salicylic acid sublimates afterwards in long needles. The 

 liquid distillate is desiccated by chloride of calcium, and rectified. — 

 Colourless, oily liquid, smells 2)leasantly aromatic, somewhat like 

 bitter almonds; has a burning aromatic taste, congeals at — 20° to 

 a translucent crystalline mass; has a density of 1'173, boils 

 between 160° and 170°; reddens litmus-paper first, and bleaches 

 it afterwards; dissolves copiously in water, in every proportion in 

 alcohol and ether; in alkalies with yellow coloin-; the aqueous 

 solution, even when largely diluted, coloiu-s the salts of oxyd of 

 iron ])ui'ple-violet. The Salicylites of the alkalies are yellow and 

 moderately soluble, and give the same reaction with oxyd of iron 

 compounds as the free acid. Tae Salicylites of the other metallic 

 bases are for the greater part insoluble in water. 



[SnUiUderill. De Yry's Glucosid (l) of the bark of Samadera 

 indica. Obtained by treating the alcoholic extract with water, 

 digesting the aqueous liquid with charcoal, and exhausting the 

 latter by hot alcohol. — Is extremely bitter, and only obtained in 

 the amorphous state.] 



Samlal-Re(l=:SANTALiN. 



8<lll(lrtriK'. llesinous exudation of Callitris quadrivalvis. Pale- 

 yellow grains, similar to mastic, but not softening in the mouth, 

 readily soluble in alcohol of 80%, also in ether. By treating with 

 cold alcohol of G0%, one-third remains undissolved (sandaracin). 

 It contains three resins, one of which is j^i'ecipitable from the 

 alcoholic solution by alcoholic potash, while the two other ones are 

 separable by alcohol of 60%, 



Srtll«"lliuai'ill = CHELERYTHRIN. 



rS5nit5ll::=CiG Hg Oq. Obtained by "VVeidel from sandal-wood 

 (Pterocarpus santalinus) by exhausting with boiling water, con- 

 taining a little potash; precijiitating with hydrochloric acid; dis- 

 solving the 231'ecipitate in boiling alcohol, and allowing to crystal- 

 lise. — Forms colourless crystals, devoid of taste or smell, not 

 soluble in water, benzol, chloroform, sulphide of carbon, and bvit 

 sparingly in ether; yields with potash a faintly yellow solution, 

 which soon turns red and green.] 



SilUtalill or iSaiitulic Aci(l = C!3o Hu Oio. The red pigment of 

 the wood of Pterocai-jnis santalinus. Boil the ethei'eous or the 

 alcoholic extract with water, the S. remaining undissolved. — 

 Forms microscopic, beautifully red ])risms, inodorous and taste- 

 less, of an acid reaction ; fuses at 1 04c°, decomposes above the 

 fusing point ; is insoluble in water, dissolves readily in alcohol 

 with blood-red, in ether with yellow colour, less in fixed and in 

 volatile oils, readil}^ in acetic acid and ijrecijiitable therefrom by 



