O. J. Eigsti

• Colchicine in agriculture, medicine, biology and chemistry
• A co-operative research project
• A cytological investigation of Polygonatum using the Colchicine-pollen tube technique
• The conversion of a refrigerator into a constant temperature chamber for temperatures ranging from 1C̊ to 26C̊
• The effects of certain hormones, drugs, amino acids, and vitamins on mitosis in the pollen tuve of Tradescantia occidentalis
• The induction of polyploidy in Phlox by colchicine
• The occurrence of a pollen tube with four sperms and two tube nuclei in Polygonatum