APPENDIX. 153 
COMBRETACEZ, 
Myrobalans. 
G. Zoelfell (Arch. der Pharm., 1891, 123—160) states that 
the tannin of myrobalans is a mixture of two tannins, one of which 
is the glucoside of gallic acid, yielding upon hydrolysis gallic acid 
and sugar (dextrose); the other tannin present is a tannic acid 
*°H*°O" which at 100° C, loses two molecules 
of water, The anhydrous acid C'*H°O% is called ellagic acid (the 
formula of which is generally given as C'*H%0°); the hydrated 
acid C’°H**O"° is called ellaggenic acid ; the latter forms a wad 
acetyl derivative, indicating five and fons hydroxyl groups, respec 
tively, in the acids. The tannins were separated by heectaa 
precipitation with lead acetate, subsequently purified by precipitation 
with sodium chloride and solution in acetic ether. 
Terminalia chebula. 
Mr. A, Campbell Stark submitted a paper on the “ Preliminary 
Proximate Analysis of a sample of commercial Myrobalans” to the 
Pharmaceutical Conference, August, 1892. 
A finely powdered and well-mixed sample yielded 7:05 per cent. 
of moistitre and 2°3 per cent. of ash— 
Free fatty acid ose S02 
Waa 
Petroleum Ether Extract ... 
aS ler oak 428 
f Gallic acid... 3°02 
Tannin iat =. oe 
Ethereal sci rer ae Roem pada: ee 
: Brown resin .,.. eu ee 
Tannin 2 188 
Alcohelic Extract .., | Bitter principle wa ee G 
Gluco sik wei ES 
sce pe fo 
Pidebesin cad inn 25 eee 
Colouring matter ...  °*35 
Pale green substance .... ‘71 
Aqueous Extract ‘ian *s see ey SAD 
The soft green resin found in the aiid, extract is presumably the 
“‘Myrobalamine” of Dr. Apery. The tannin was estimated in the 
aqueous solution of the alcoholic extract by means of copper acetate, - 
r 
