Created by: Steve Solomon ssolomon@soilandhealth.org FAMILIAR LETTERS ON CHEMISTRY, AND ITS RELATION TO COMMERCE, PHYSIOLOGY, AND AGRICULTURE, BY JUSTUS LIEBIG, M.D., PH. D., F.R.S., PROFESSOR OF CHEMISTRY IN THE UNIVERSITY OF GIESSEN. EDITED BY JOHN GARDNER, M.D., MEMBER OF THE CHEMICAL SOCIETY. Second Edition, Corrected. LONDON: MDCCCXLIV. PREFACE The Letters contained in this little Volume