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Related article: COMPOSrTiE.
Ageratum Conyzoides and A, Mexicanum-- Vaso- Con trie tor AikaJoiia/ ,
Digitized by VjOOQ IC
190 REPORT ON THE PROGRESS OF PHARMACY.
ConsHtuenL J.Chevalier has isolated from Ageratum conyzoides an alka-
loid, forming a crystalline hydrobromide, which has marked vaso-con-
strictor action, similar to that of ergot, but of very low toxicity and
without action on the heart. The allied Ageratum mexicanum^ of Euro
pean gardens, contains the same base, but in smaller quantity. Pharro.
fourn. and Pharmacist, June 18, 760; from L'Union Pharm., j/ (1910),
211.
False Arnica Rhizomes Examination and Comparison with Genuine
Rhizomes. E. M. Holmes observes that for some months past truf arnica
rhizome has been very scarce, with the result that other roots Buy Fosamax Online are mixed
with it in considerable proportion, in some cases as much as 20 per cent.
One of these roots was submitted to Mr. Bertram Cockburn for micro-
scopic examination. This has twice the diameter of the true rhizome,
and the tranverse section shows a woody center, with radiating woody
wedges Buy Fosamax Online and medullary rays of about equal thickness, which at once dis-
tinguishes it from arnica. The microscopic examination showed that the
vessels and sieve tubes contain a yellow oily secretion, which is also
present in large oil ducts placed intermediately outside the phloem, as in
arnica. Only traces of inulin were observed in the sections examined.
Large oblong sclerotic cells are present in the cortex of the false arnica,
which afford an easy means of distinguishing it, if present in powdered
arnica. The odor of the root and the tincture are very similar to that of
true arnica.
The characteristics of the two rhizomes in powder may be thus de-
scribed :
Arnica Montana, Abundant parenchyma with inulin. Absence of
large yellow sclerotic cells. Characteristic thin-walled multicellular brown
hairs.
False Arnica, Abundance of wood cells and vessels. Large yellow
oblong sclerotic cells. Dark color of cortical parenchyma and cell con-
tents. Traces of inulin only, Pharm. Journ. Buy Fosamax Online and Pharmacist, Jan. 15,
1910, 51.
Coltsfoot New Phytosterols in the Flowers, T. Klobb, in the course
of an investigation of the cholestrol alcohols of the CompositcR^ has isolated
two new phytosterols from coltsfoot flowers. One of these, melting at
ii7'*-ii9

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