1. The edible arracacha—A little-known root crop of the Andes

   • W. H. Hodge

   Semi-Popular Articles Pages: 195 - 221

2. Botanical aspects of oregano

   • Lucas Calpouzos

   Semi-Popular Articles Pages: 222 - 233

3. Utilization abstract

   Abstract Pages: 233 - 233

4. Tree-rings and history in the western United States

   • Edmund Schulman

   Semi-Popular Articles Pages: 234 - 250

5. Wheat breeding and our food supply

   • L. P. Reitz

   Semi-Popular Articles Pages: 251 - 268

6. Stimulation of pine oleoresin flow by fungus inoculation

   • Russell B. Clapper

   Original Research Pages: 269 - 284

7. Utilization abstract

   Abstract Pages: 284 - 286

8. Book reviews

   BookReview Pages: 287 - 288