Essays, political, economical, and philosophical. By Benjamin Count of Rumford, Knight of the orders of the White Eagle, and St. Stanislaus; Chamberlain, Privy Counsellor of State, and lieutenant-general in the service of His Most Serene Highness the Elector Palatine, reigning Duke of Bavaria; colonel of his regiment of artillery, and commander in chief of the general staff of his army; F.R.S. Acad. R. Hiber. Berol. Elec. Boicoe, Palat. et Amer. Soc. ; Vol. I[-III].