1. Micrurgy and the plant cell

   • E. M. Hildebrand

   OriginalPaper Pages: 277 - 330

2. Absorption of water by plants

   • R. O. Slatyer

   OriginalPaper Pages: 331 - 392

3. Liberation of organic substances from higher plants and their role in the soil sickness problem

   • Horst Börner

   OriginalPaper Pages: 393 - 424