Wet drug jar.

The inscription means "syrupus de erysimo" or "syrup of hedge mustard." It is composed of hedge mustard, elecampane, colts foot, liquorice root, borage, succory, maiden-hair, the flowers of rosemary and betony, aniseeds, and stone raisins, soaked in water and mead, then clarified and boiled with a lot of sugar to get the consistency of a syrup. See Spencer Collection.
Title from Spencer.
Spencer, K. M. James N. Spencer Collection of English Delftware Apothecary Jars, 6
The apothecary jar is bulbous with an everted glazed neck, a short front spout with a wide flared mouth, and a large rear strap handle. The body of the jar is mounted on a small, short neck that flares out to a small foot with a glazed edge. A small cork is inside the spout. The base is not glazed, but it has been repaired with an over-coating of a light blue glaze. The body of the jar is decorated in blue with a cherub and shell design. The jar is a fishtail-pellet variety. See Spencer Collection.