Education and Reform at New Harmony: Correspondence of William Maclure and Marie Duclos Fretageot, 1820-1833

Observations on the Geology of the United States of America: With Some Remarks on the Effect Produced on the Nature and Fertility of Soils, by the Decomposition of the Different Classes of Rocks; And an Application to the Fertility of Every State in the U

Observations on the Geology of the United States of North America: With Remarks on the Probable Effects That May Be Produced by the Decomposition of the Different Classes of Rocks on the Nature and Fertility of Soils: Applied to the Different States...

To the People of the United States

Opinions on Various Subjects, Dedicated to the Industrious Producers. Volume 2 of 3