The leaves of Castanea vesca, collected in September or October, while still green.

Characters. - From six to ten inches (15 to 25 centimetres) long, about two inches (5 centimetres) wide, petiolate, oblong-lanceolate, acuminate, mucronate, feather-veined, sinuate-serrate, smooth; having a slight odour, and a somewhat astringent taste.

Preparation.

dose.

Extractum Castaneae Fluidum......................................................

1/2-1 fl. dr.

Uses. - It has been used in whooping-cough. Its taste is not disagreeable, but it has no extraordinary physiological power.