Bread unpredictable since the steam is not produced until the bread is baked. Steam leavening happens regardless of the raising agents (baking soda, yeast, baking powder, sour dough, beaten egg white) included in the mix. The leavening agent either contains air bubbles or generates carbon dioxide. The heat vaporises the water from the inner surface of the bubbles within the dough. The steam expands and makes the bread rise. This is the main factor in the rising of bread once it has been put in the oven. CO generation, on its own, is too small to account for the rise. Heat
Aerated Bread Company stores. Having entered commercial life as a show-room manager in the religious publishing business of Mr Chrysostom Lorton of Paternoster Row, Enfield, Augustus Carp makes several references to the Aerated Bread Company in a detailed description of his daily routine: At eleven o'clock, therefore, I would despatch Miss Botterill to a neighbouring branch of the Aerated Bread Company for a glass of hot milk and a substantial slice of a cake appropriately known as lunch cake. I would then, at twelve-thirty, repair in person to the same branch of this valuable company, where I would generally order from one of