1. Fertility of hybrids fromSolanum phureja and haploidS. Tuberosum matings

   • R. W. Ross
   • S. J. Peloquin
   • R. W. Hougas

   Articles Pages: 81 - 89

2. The respiration of developing potato tubers

   • W. G. Burton

   Articles Pages: 90 - 101

3. Recent research in Roumania on blackleg and bacterial soft rot of potato

   • I. Lazâr
   • El. Bucur

   Articles Pages: 102 - 111

4. The occurrence of potato heat-necrosis symptoms in Israel and the use of affected tubers as seed

   • S. Simmerman-Gries

   Articles Pages: 112 - 118

5. Increasing gene frequency for immunity to potato virus X in tetraploidSolanum tuberosum L. through inbreeding

   • W. J. Hooker
   • N. R. Thompson

   Articles Pages: 119 - 126

6. Reviews

   • J. A. Hogen Esch
   • K. B. A. Bodlaender
   • E. D. van der Zaag

   BookReview Pages: 127 - 128

7. Sections notices

   Association News Pages: 129 - 132