331 



concentrated acids, and by its fluorescence, whicli has not been 

 recorded of the other alkafoid. — (F. von Mueller and L. Rummel.) 



ClirySOpliailiC Acid contained to the extent of up to 84% in 



the Goo- or Bahia- or Arariba- or Araroba-powder, obtained from 

 the medulla of the wood of Centrolobium robustum, Mart., and 

 C. tomentosum, Benth.; large Brazilian trees (Silva-Lima, 

 Neumann, Voigt. ) 



DllllOisill.— Volatile alkaloid of the leaves and twigs of Du- 

 boisia myoporoides, R. Br., and probably identical with the 

 Pitiu-in found by Staiger in Duboisia Hopwoodii, F. v. M. Pre- 

 pared like Nicotin. — -Yellowish oily liquid, lighter than water, of 

 a strong nai'cotic odour, resembling that of nicotin and also of 

 cantharides, of a very strong alkaline reaction, neutralises the 

 acids completely ; dissolves in any quantity of water, alcohol, and 

 ether; throws down ferrous oxyd from subsulphate of iron; dis- 

 solves colourless in concentrated acids. Its hydrochloride in a 

 weak aqueous solution is precipitable by bi-iodide of potassium, 

 the iodides of potassio-mercury and of potassio-bismuth, and by 

 tannic acid, not by other alkaloid reagents. Nicotin, to which 

 Duboisin resembles, is distinguished from the latter by its specific 

 gravity, its less powerful odour, and by its hydrochloride in a 

 diluted aqueous solution being precipitated by [jhosphomolybdate 

 of soda, picric acid, and chloride of platinum. — (F. von Mueller 

 and L. Rummel.) 



Erytlirojlhlaein (see page 229). — This alkaloid has also been 

 obtained from the bai-k of Erythrophlaeum Laboucherii, F. v. ]VI. 

 The E. cxystallises in needle-shaped crystals, which are often 

 united in tufts and arranged m the form of an oblique cross; it is 

 almost tasteless, not bitter, either by itself or united with acids; 

 its concentrated solution in aqueous alcohol is 2>i"ecipitable on 

 addition of absolute alcohol; its salts are likewise ))recii)itated by 

 phospho-molybdate and phospho-tungstate of soda; it appears to be 

 nearly related to Laburnin. It occurs in the dry bark to the 

 extent of about 2%. This alkaloid may be sought for also in 

 a species recently rendered known from the Seychelles. — (F. von 

 Mueller and L. Rummel.) 



Pilocarpin, C23 H31 N4 04^ according to Kingsett, Journ. Chemie. 

 Soc, October, 1876. This alkaloid, the only one of the Jaborandi, 

 on distillation with caustic potass yields tiimethylamin. To 

 obtain Pilocarpin the Jaborandi is exhausted with alcohol and 

 tartaric acid by a process similar to that followed by Duquesnel 

 for isolating aconitin. — (C. R. Blackett). 



Pyi'OCatechill (Oxyphenal or Oxyphenic acid) is formed by the 

 dry distillation of Catechin, and is also obtainable from wood- 



