A contribution to the problem of the concept “biological clock” (part I) W. Van Laar OriginalPaper Pages: 95 - 139
Ionenverhältnisse und die Besiedlung hyperhaliner Gewässer, besonders durch Insekten Harald Nemenz OriginalPaper Pages: 148 - 170
The energetic economy of the organism in animal evolution C. Wittenberger OriginalPaper Pages: 171 - 185
The relation of biology to physics and chemistry — An evaluation of some recent issues in the philosophy of science W. J. Van Der Steen OriginalPaper Pages: 186 - 211
Proposal of general, ethical statement for natural scientists J. Dullaart OriginalPaper Pages: 212 - 214
