194 ABSTRACTS OF PAPERS FROM OTHER JOURNALS. 
with a crimson colour, becoming yellow on warming; sulphuric 
acid with reddish brown colour changing to dirty green; with 
hydrochloric acid it gives a yellow solution. 
Astonia Bark. O. Hesse. (Deut. Chem. Ges. Ber. XI, 2232; 
C.8.J. XXXVI, 332. 
The bark contains from 2 to 25 per cent. of chlorogenine and 
0-1 per cent. of porphyrine. The author considers that Palm’s 
alstonine (Wittstein’s Viertel Jaresb. f. pr. Pharm., XII, 161) is 
a mixture of these two alkaloids, and that the alstonine of Mueller 
and Rummel is probably impure chlorogenine. 
ALSTONIA ConstRicTA, Oberlin and Schlagdenhauffen. (Pharm. 
J. Trans. [3]. X 1059. O.SJ. XXXVIII, 197. 
The bark extracted with ether, alcohol and water successively 
ives up 1-038, 27-74. and 1-371 per cent. of extract respectively. 
The orange-coloured residue left on evaporating the etherial solution 
taken up in dilute hydrochloric acid (1-200) treated with animal 
charcoal, precipitated with ammonia and redissolved in ether, 
{these operations being repeated until all colouring matter 1s 
removed) crystallizes in silky tufts of lustrous needles from the 
etherial solution. It is soluble in ether, alcohol, chloroform, 
benzine, acetone and light petroleum, moderately soluble ™ 
boiling water but insoluble in cold. It dissolves readily in dilute 
acids, and is precipitated by the same reagents as the other 
alkaloids. It is easily soluble in concentrated sulphuric, nitric, 
or hydrochloric acids, without colouration, but on diluting these 
solutions a blue fluorescence is produced. Concentrated sulphurie 
acid with bichromate of potasssium colour the crystals intensely 
blue-green, passing to violet and purple; on adding water 4 
¢runson solution is obtained. 
Porpuyrine. O. Hesse. (Ann. Ch. Pharm. Suppl. IV, - 
Watt’s Dict. Suppl. I, 955. 
ase obtained from an Australian bark (Alston 
ized by animal charcoal and evaporated, when the 
