Intelligence and Miscellaneous Articles, 



ration of the ftitonici acid weighei^lf Oi^^yThejiesult of this analysis 



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analysis is easier than by sulphuric acid ; but the results bbtslMsl) 



are less certain. — Ann. de Ch. et de Phys., Nov. 1845. a£v/ lij; 



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ANALYSIS OF CASCARILLA — CASCARILtlNE. BV M. DUVAL,^;^ 



The following principles were found by the author in cascarilla i^ 

 Albumen, Tannin of a peculiar kind, Crystallizable bitter matter 

 (Cascarilline), Red colouring matter. Fatty matter having a nauseous 

 smell. Wax, Gummy matter. Volatile oil of an agreeable odour, Resin, 

 Starch, Pectic acid. Chloride of potassium. Salt of lime, Lignin. 



Of these various principles, the bitter matter, or cascarilline, is the 

 most interesting in the opinion of the author ; it was extracted by 

 the following process : — The cascarilla reduced to a moderately fine 

 powder was introduced into a percolating apparatus, and treated 

 with water ; the infusions being mixed, acetate of lead is to be added ; 

 filter and get rid of the excess of lead by sulphuretted hydrogen ; 

 filter again and evaporate the liquor to about f , then add a little ani- 

 mal charcoal and filter again ; the evaporation is to be continued at 

 a very low temperature ; at a certain period a pellicle is formed, and 

 the liquor, before it acquires the consistence of a syrup, is to be al- 

 lowed to cool. Sometimes the matter does not crystallize ; it then 

 assumes a resinous appearance, and the greater part of it adh'feif^s^'tfif^ 

 the vessel; this substance hardens on cooling. '*■-'* '*-'^'^ 



In order to purify the product, whether crystalline or resinous in 

 appearance, it is to be powdered, put into a tube, and alcohol of sp. 

 gr. 0'8763 added cold, and rather more than is requisite to moisten 

 it. After sufficient digestion, the alcoholic liquid, which is highly 

 coloured, is to be separated ; by these means the greater part of the 

 colour and fatty matter of the cascarilline are removed ; and the re- 

 sidue, which is evidently decolorized, is to be dissolved in boiling 

 alcohol of sp. gr. 0'8439; a little animal charcoal is to be added, 

 and after filtration the liquor is to be suffered to evaporate sponta- 

 neously. The residue is to be dried on filtering-paper, triturated 

 with cold and dissolved in boiling alcohol, filtered and set aside to 

 evaporate spontaneously, and iijr this the cascarilline is obtained 

 pure. , ■ ;. o:.v.:ii' ,v ^.- ;.. 



The properties of cascarilline are, that it is white and crystallized ; 

 the crystals, when examined by the microscope, have usually the 

 form of prismatic needles, and sometimes that of hexagonal plates. 

 Cascarilline is inodorous, bitter, but not immediately so, on account 

 of its slight solubility in water ; when heated in a glass tube, it fuses 



