> 5 
* 
2882 XAN—ZIN- 
Wo. 547.—XAnTHOXYLUM FRAXINEUM. Prickley 
= os ver 
Se No. 740. z 
_.- The root officinal by the Phar. U.S. A good subject for an 
Cabinet specimens, Jeff. Coll. Nos. 738 and 739—figure, 
‘imaugural dissertation. | ae 
No. 548.—Zincum oxypum. L. E. D. Oxide of 
~ Zinc—(flowers of Zinc.) 
Cabinet specimen, Jeff. Coll. No. 741. 
-____ Used, besides internally, externally, as a mild astringent in 
the unguent. zinci. “Dr. Roloff of Magdeburg, has dis- 
covered the presence of arsenic in this preparation; by 
boiling the substance in distilled water, and assaying the 
solution with the ammoniaco-nitrate of silver, its presence 
may be instantly recognised; chalk may be detected by 
sulphuric acid producing effervescence ; and white lead, 
by its forming an insoluble sulphate of lead. It ought to 
_ be volatile.” —Paris. 
Mepicat Prorrrtizs anv Users. A tonic—used in epilepsy, 
chorea, and other neuroses. Dr. Chapman desires to 
claim the original practice of giving large doses of this 
medicine. He observes, “it has, at least in my hands, been 
of little use, till the quantity was increased to 15 or 20 
grains, several times in the day. I have more than once 
given a drachm of it, in 24 hours. The only disagreeable 
effect from such a quantity; ismausea, which, however, is 
not of a distressing nature. We may safely commence 
_ with a dose of 4 or 5 grains”—and in a note immediately 
following, he continues: * exactly this course, I find to 
be recommended in a late English work of merit—Bed- 
ingfield’s Medical Practice. As regards myself, it is, how- 
ever, kitown to be original, haying publicl: ; n 
pursued the practice, long before the appearance of that 
at rn 
‘The following isan extract fiom CGeeke-omnervous diseases, — 
~~~" the American ed, of whose work was published in 1824.— 
_ Dr Hart, in his inaugural dissertation, speaks very highly 
_ of the use of the flores zinci, and adduces several instances 
_in which it was found efficacious. Dr. Guthrie, in’a letter 
to Dr. Duncan, mentions a most alarming case of epilepsy, 
-- in which the paroxysms returned four times in twenty- 
- four hours, with wonderful violence, while each fit was 
_. accompanied by a most distressing tetanus. In this in- 
-*Therapentics, article Carb. Zine 
