precipitation method suggested by Thoms. The results obtained by 
the use of the Ph. Germ. IV method are decidedly higher than those 
obtained by the other two. — Pharm. Post, Wien, 1906, y. 39, p. 533. 
(See also pp. 551-552.) 
The Ph. Brit. Committee of Reference in Pharmacy recommend 
standardizing green extract of belladonna to 1 per cent alkaloid. — 
Chem. & Drug., Lond., 1906, v. 69, p. 863. 
Philipp Roder, Wien, presents a modification of the assay process 
for extract of belladonna and reports a number of assays. The alka- 
loid content of the several samples reported on varied from 0.934 to 
1.735 per cent of alkaloids. The Ph. Austr. VIII requires an alka- 
loid content of 2 per cent and the absence of chlorophyl. — Pharm. 
Post, Wien, 1906, v. 39, p. 249. 
Matthes and Rammstedt report having examined several samples 
of extract of belladonna by the method proposed by Thoms to deter- 
mine the acid and tannin content. The}^ believe that the determina- 
tion of these factors does not lead to correlating results, and that as 
yet the determination of the alkaloid content is the sole reliable 
factor. — Pharm. Ztg., Berl., 1906, v. 51, p. 1032. 
Dieterich, Karl, reports examining a number of samples of extract 
of belladonna. The samples of extract of belladonna Ph. Germ. IV 
varied from 1.012 to 2.09 per cent of alkaloids; extract of belladonna 
root Ph. Germ. IV varied from 1.50 to 2.36 per cent of alkaloids, 
and extract of belladonna Ph. Austr. VII varied from 2.18 to 2.99 
per cent of alkaloids. The alkaloid content of the extract of bella- 
donna Ph. Austr. VIII agreed in the main with the alkaloid content 
of the Ph. Germ. IV extract. — Helfenberger . Annalen 1905, 1906, 
v. 18, pp. 159-160. 
Caesar and Loretz report finding admixtures of the leaves of 
Scopolia carniolica in belladonna leaves and also having offered to 
them the former as belladonna. G. Fromme reviews the assay of 
belladonna and reports a number of comparative results. — Geschafts- 
Ber., v. Caesar & Loretz, 1906, p. 23-29. 
Philipp Roder, Wien, reports that two samples of tincture of bella- 
donna were found to contain, respectively, 0.023 and 0.036 per cent 
of alkaloid. The Ph. Austr. VIII requires 0.03 per cent. — Pharm. 
Post, Wien, 1906, v. 39, p. 297. 
Jacobi, A., states that he has found that belladonna relieves the 
dysuria seen with the internal use of methylthionine hydrochloride 
much better than nutmeg, which has been recommended for that pur- 
pose. — J. Am. M. Ass., 1906, v. 47, p. 5145. 
Lafon, Ch., reviews the use of the several mydriatic alkaloids and 
their derivatives as collyria, calls attention to some of the secondary 
results that have been observed, and suggests the use of an aqueous 
