In 1963, 1965 and 1967 "Symposia on Quantitative Biology of Metabolism" were organized on the pretty island of Helgoland (Biologische Anstalt) by me in col­ laboration with O.  Meer

The development of the life sciences may be said to have effected a gradual transition from a more or less intuitive prescientific approach based on crude observation, via a more refined type of observation to experimentation and hence to the level of formal theories.  Meer