Dry ice, sometimes referred to as  cardice  (chiefly British chemists), is the solid form of carbon dioxide. It is used primarily as a cooling agent.Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere).It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.t is used primarily as a cooling agent. Its advantages include lower temperature than that of water ice and not leaving any residue (other than incidental frost from moisture in the atmosphere). It is useful for preserving frozen foods, ice cream, etc., where mechanical cooling is unavailable.
Maryland is also called the Old Line State and Free State.The Old Line nickname was given during the Revolutionary War, when 400 soldiers in the First Maryland Regiment fought a British force of 10,000 and helped General George Washington's army to escape.
MARYLAND AT A GLANCE. Maryland's name honors Queen Henrietta Maria (1609-1669), wife of Charles I (1600-1649), King of Great Britain and Ireland, who signed the 1632 charter establishing the Maryland colony. Queen Henrietta Maria was the daughter of Henry IV of France (1553-1610) and his second wife, Marie de Medici (1573-1642). She also was the sister of Louis XIII (1601-1643) of France. Married to Charles I at sixteen, she had nine children, of whom three died in infancy.