Lemonade is a beverage almost as widely consumed as soda water throughout all parts of the United States. Lemonade is a beverage made from the expressed juice of lemons, sweetened to suit the taste with sugar. The water which is employed may be either plain, potable water or sometimes water impregnated with carbon dioxid. The lemon juice which is used in lemonade contains not only the acid citrate of potash as its acidifying agent, but also the aromatic flavors, consisting of oil, ethers, etc., characteristic of the lemon itself. The rinds are frequently added and give an additional bitter taste due to a glucoside of some kind, probably of a tannic nature, residing particularly in the skins.