Life - its foundation and preservationThis work was the first book to attack Von Liebigs salt fertilizer thesis, and it stands as valid today as when first written over 120 years ago. Translated from the German writings of Julius Hensel, the book was designed to introduce the people of the U. S. to the idea that plants require healthy food in order to flourish, just as a human being does. It describes a then new and rational system for fertilization which has become science today