224 
SELECTED ARTICLES. 
Before experimenting with the new jalap, and ascertaining, 
as a point of departure, the chemical investigations which 
have already been made, the committee has thought it requisite 
also to take into consideration as an object of comparison, the 
most recent and probably the most complete analysis that has 
been made of officinal jalap. 
It results from this preliminary investigation: — 
1st. That the Convolvulus Orizabensis, analyzed by M. 
Le Danois, has given in one thousand parts, — - 
2d. That the Convolvulus officinalis, analyzed by M. 
Felix Cadet, has afforded in one thousand parts,- — 
country. We are now enabled to supply the deficiency from the third 
edition of the Histoire Mr e gee des Drouges Simples, by M, Guibourt. He 
states that it is known in the shops of Paris by the name of light jalap, 
(jalap leger,) but that he prefers that of fusiform jalap. 
"This species of jalap, (Convolvulus Orizabensis, Pell., Journ, de Chim. 
Med., t. x. , p. 10,) has a large root, which is cylindrical, fusiform, twenty 
inches long, branched at its termination. It is yellow exteriorly, of a 
dull white internally, and lactescent. 
The plant is slightly villous throughout. The stem is cylindrical, green, 
pretty firm, little voluble, and can dispense with support ; the leaves are 
very large, rounded, deeply cordiform, shortly acuminate, villous on the 
inferior nerves ; the petioles are also villous, of the same length as the 
limb. The peduncles are slender, uni, rarely bi-tlowered. The corolla 
is campanulate, of a reddish purple, stronger and thicker than that of the 
true jalap ; the limb little patulous. The stamens and pistil are short and 
included. The capsule is two-celled, one-seeded. The seeds are almost 
spherical, of a blackish brown, and a little rugose," His description of 
the drug is precisely that given by Mr. Smith, to which the reader is 
referred. With the paper now presented, the Journal of Pharmacy con- 
tains all the information respecting jalap that has been obtained up to the 
present time. 
Resin, 
Gummy extract, 
Fecula, 
Albumen, 
Lignin, 
80 
256 
32 
24 
580 
J. C, 
