Figure 11 Two-tone jug, Bristol (Avon County), England, late 1800s. Stoneware, with Bristol glaze over partial iron wash. H. 15 1/2". Marks: Powell + Bristol; “857 / T Hill Wine & Spirit Merchant / Ramsbury.” (Photo, Gavin Ashworth.) Developed in 1835, Bristol glaze contains feldspar, whiting (as a flux), and often zinc oxide (as a whitener and opacifier). The jug was made for a merchant at Ramsbury, a village in the adjacent county of Wiltshire. The Powell of the mark probably refers to the firm of William Jr. and Septimus, descendants of William Powell, who codeveloped Bristol glaze. The firm was sold to Charles Price in 1906.