Quick bread leavening agents include a weak base, such as baking soda (sodium bicarbonate) plus a weak acid, such as cream of tartar, lemon juice, or cultured buttermilk, to create an acid–base reaction that releases carbon dioxide. (Quick bread leavened specifically with baking soda is often called "soda bread".) Baking powder contains both an acid and a base in dry powdered form, and simply needs a liquid medium in which to react. Other alternative leavening agents are egg whites mechanically beaten to form stiff peaks, as in the case of many waffle recipes, or steam, in the case of cream puffs. Nevertheless,
J. H. Hobbs, Brockunier and Company experiments were not successful. In the fall of the same year, William Leighton Sr. joined the firm as a partner, and continued the experiments with lime glass. Leighton came from a glass making family, and had worked at New England Glass Company. In 1864, Leighton had success. His major change in the formula for glass was using bicarbonate of soda instead of soda ash. His formula was similar to the long-lost soda-lime formula used many years earlier in Europe. The glass made using this formula had good enough quality that the company could compete in the high-end of the glassware