1. A defence of the experiments to determine the comparative value of the principal varieties of fuel used in the United States, and also in Europe: containing a correspondence with a committee of the American Academy of Arts and Sciences, their report, and remarks thereon : and animadversions on the manner in which the trust confided to the Academy by Count Rumford has been managed Author(s): Bull, Marcus, 1787-1851 Publication: Philadelphia : J. Dobson, 1828 Subject(s): HeatingCoalWoodRumford, Benjamin, Graf von, 1753-1814.