Flammable Residues Detected in Medieval Vessels in Jerusalem

QUEENSLAND, AUSTRALIA—According to a Cosmos Magazine report, some of the eleventh- and twelfth-century vessels unearthed in Jerusalem’s Armenian Garden in the 1960s may have been used as a sort of hand grenade. Carney Matheson of Griffith University analyzed residues from the vessels and found that some had held mercury, oil, and medicines, and some had been used for drinking beer. But traces of a flammable and possibly explosive material was found in some of the containers, which ar