 A serious movement for merger of law and equity began in the states in the mid-19th century, when David Dudley Field II convinced New York State to adopt what became known as the Field Code of 1848.The federal courts did not abandon the old law/equity separation until the promulgation of the Federal Rules of Civil Procedure in 1938.Today three states still have separate courts for law and equity; the most notable is Delaware, whose Court of Chancery is where most cases involving Delaware corporations are decided.