Vintage apothecary bottle from the 1920's to the 1940's. Contained Hydrargyrum oxydatum flavum or yellow mercury sediment, a potent antimicrobial agent used in a variety of external preparations for treating eye and skin diseases. The dark amber bottle is necessary because the compound is very light sensitive. This bottle, which most likely came from Eastern Europe, has a red and white decal label (no cover glass was used). The bottle measures 4" tall by 1 3/4" by 1 1/2". The bottle has curved sides, and the solid octagonal cut glass stopper is loose.