TO THE SCIENTIFIC EXAMINATION OF SOILS: COMPRISING SELECT METHODS OF MECHANICAL AND CHEMICAL ANALYSIS AND PHYSICAL INVESTIGATION. TRANSLATED FROM THE GERMAN OF DR. FELIX WAHNSCHAFFE. WITH ADDITIONS BY WILLIAM T. BRANNT, EDITOR OF "THE TECHNO-CHEMICAL RECEIPT BOOK." ILLUSTRATED BY TWENTY-FIVE ENGRAVINGS. PHILADELPHIA: HENRY CAREY BAIRD & CO., 1892. COPYRIGHT BY HENRY CAREY BAIRD & CO. 1891. PRINTED AT THE COLLINS PRINTING HOUSE, 705 Jayne Street, PHILADELPHIA, U. S. A. PREFACE. THIS translation of Dr. Felix Wahnschaffe's Anleitung zur wissenschaftlichen Bodenuntersuchung, has been prepared in the belief that it will prove of interest to those engaged in scientific agriculture and the investigation of agricultural problems. Some of the methods of analysis described are in use in the laboratory of the Royal Prussian Geological Institute, whilst others have been taken from approved text-books, but in many respects modified by Dr. Wahnschaffe. Only methods yielding scientifically useful results, and of comparatively easy and rapid execution, have been selected. |