36 
OBSERVATIONS ON MONARDIN. 
Bark of the Pad Pereira. 
This article is referred to a species of Vallezia belonging to 
the family of Strychnea. It is the inner layer of the bark, 
immediately in contact with the wood. 
The specimens are in flat pieces eighteen inches in length, 
3 in width, and 3 or 4 lines in thickness, of a light brown co- 
lour, very fibrous and stringy, with little odour, and a very 
bitter taste. 
From the analysis of Prof. PfafT, it appears that it contains 
an alkalineprinciple (pereirina,) resinous extractive, starch and 
a vegetable acid, with salts of potassa, lime, magnesia, &c. 
The discovery of the alkaloid principle is first to be attributed 
to Sr. Santos of Rio de Janeiro. 
This drug has some reputation as a remedy in intermittent 
fever in Brazil, as in the hands of numerous practitioners it has 
proved serviceable. A preparation called " Jlgua antifebril" 
is used, which we presume is an infusion of it. It is employ- 
ed internally and externally. (Formulario.) 
ART. XX.— OBSERVATIONS ON MONARDIN, A PECULIAR 
CRYSTALLINE SUBSTANCE, DERIVED FROM THE VO- 
LATILE OIL OF MONARDA PUNCTATA. 
By William Procter, Jr. 
The volatile oil of horsemint (Monarda punctata) is exten- 
sively employed in this country as a rubefacient, either by it- 
self, or in conjunction with other substances, in the form of 
liniments, and from its great pungency is considered a valua- 
ble remedial agent. Several of our druggists* have observed 
* The specimen of Monardin which furnished the material for this 
essay, was presented to the College of Pharmacy of this city by Ed- 
ward Wayne, about a year since, with the remark that the canister from 
which it was taken contained a very considerable deposit of this sub- 
stance. Samuel F. Troth and Charles Ellis have likewise observed this 
phenomenon. 
