Carpenter on Cinchona Bark. 363 
Arr. XXVI.—Some Experiments and Remarks on several 
species and varieties of Ctnchona Bark. By Groner W. 
é 
ARPENTER. 
Pror. SItuiman, he * 
Dear Sir, 3 
In consequence of the late prevailing endemics, ague and 
intermittent fevers, which have been so universally felt in al- 
most every section of our country, in many places to a very 
alarming and distressing degree, the article Cinchona has in- 
creased very considerably in practice and demand, and has 
become one of the most important articles of the materia med- 
ed. If you thinkt e statement of sufficient interest to your 
readers, I will thank you to insert it in your next Journal. 
Very respectfully, yours &c. 
GEORGE W. CARPENTER, 
No. 294 Market-st. Philadelphia. 
Calisaya Bark. 
Of this very superior species of Peruvian bark, there are 
two varieties in commerce. 
., Ist. Calisaya arrolenda. 
inch ed a half in diameter, and from eight inches to a foot 
and a half in length. ‘The epidermis is gray and whitish — 
= 
This variety is in quill from three quarters of an inch to an 
