Proziaki Proziaki Proziaki, soda bread - flour-based rolls with added sodium bicarbonate ("proza") originating from Subcarpathia in south-eastern Poland, also common in other parts of the country. Proziaki are produced by the use of wheat flour or wheat-secale flour, eggs, sour smietana (sour cream), water, salt and a maximum of one table spoon of sodium bicarbonate, baked on traditional tile-based cookers, heated by firewood. Proziaki can be circular shaped (diameter of 6-10 cm, thickness of around 1.5 cm) or quadrilateral. Presently, most proziaki are baked on an oven pan with a small amount of fat or lard ("smalec"). Sweet variants can
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