1. Duplication of generative nuclei by means of physiological stimuli and its significance

   • W. E. De Mol

   OriginalPaper Pages: 225 - 272

2. A cytological investigation of some species and species-hybrids of the genus Saccharum

   • G. Bremer

   OriginalPaper Pages: 273 - 326

3. Genetical research with maize

   • E. W. Lindstrom

   OriginalPaper Pages: 327 - 356

4. A preliminary statement of the results ofMr. Houwink's experiments concerning the origin of some domestic animals

   • J. P. Lotsy
   • K. Kuiper

   OriginalPaper Pages: 357 - 375

5. Boekbespreking

   • L.
   • M. A. van Herwerden
   • G. P. Frets

   BookReview Pages: 377 - 384