Fig. 288. Apparatus for the percolation of

alcohol vapour through the dried herb of Indian hemp.
a. The still, charged with strong spirits.
b. The cask, containing the plant, and into the side of which the nose of the still was introduced.
c. Common condensing worm.

This image is from Cannabis sativa in Pereira's Elements of Materia Medica and Therapeutics, 1854.