This early work comprises a comprehensive treatise on agricultural chemicals, published at the request of the president and members of the board of agriculture. It consists of eight detailed lectures. A book that will be of much value to the agriculturalist and serious farmer, this text makes for a worthy addition to collections of farming literature and is not to be missed by those with an interest in the scientific side of agriculture. The sections of this text include: General Views of the Objects of the Course; Of the General Powers of Matter which Influence Vegetation; On the Organization of Plants; On Soils; On the Nature and Constitution of the Atmosphere; etcetera. This antique book was originally published in 1821, and we are proud to republish it now complete with a new introduction on farming.