THE 2-MINUTE RULE FOR SODA 77

Priestley found that water taken care of During this manner had a pleasant style, and he made available it to his friends as being a refreshing drink. In 1772, Priestley revealed a paper entitled Impregnating H2o with Preset Air in which he describes dripping oil of vitriol (or sulfuric acid as it's now referred to as) on to chalk to make carbon di