For Dirk Struik

I/Mathematics.- The Lemniscate of Bernoulli.- Summation of Series of Fractions Depending upon the Roots of the Airy Function.- Wave Propagation in Non-Viscous Fluids.- Polyhedral Numbers.- Materialist Mathematics.- Skew Curves Setting up a Null System in Space.- Über ein Beispiel zur unbestimmten Analytik und seine allgemeine Bedeutung.- Remarks on Two-By-Two Matric Semigroups.- A Unified Approach to Hypernumbers.- Some Remarks on the Concept of Limit.- La notion de fonction chez Condorcet.- II/History of Mathematics and Science.- The Modern Use of Historical Chinese Solar Observations.- The Second Part of Chapter 5 of the De arte mensurandi by Johannes de Muris.- Isaac Newton, the Calculus of Variations, and the Design of Ships. An Example of Pure Mathematics in Newton's Principia, Allegedly Developed for the Sake of Practical Applications.- The Impact of von Staudt's Foundations of Geometry.- Georg Samuel Dörffel.- Observational, Rational and Scientific Medicine in Mexico.- History of Science: A Subject for the Frustrated. Recent Japanese Experience.- The Relation between Eudoxus' Theory of Proportions and Dedekind's Theory of Cuts.- Rheticus as Editor of Sacrobosco.- Is Euclid on the Skids?.- John Pell's English Edition of J. H. Rahn's Teutsche Algebra.- Could the Specific Heat of the Elements Have Contributed to the Discovery of the Periodic System?.- III/The Nature Of Mathematics, Philosophy and Science.- Die Alexander-von-Humboldt-Forschung an der Akademie der Wissenschaften der D.D.R. - Ergebnisse und Ziele.- Ethics and Science.- A Religion of Earth. The Twentieth Century Scientific Revolution and Organized Religion.- Some Heretical Ideas with Respect to Mathematics and Physics.- A Note on Robert Hodes.- Aims and Methods of Scientific Research.- The Concept of 'Simplicity' in the Physico-Mathematical Sciences.- Should Science Survive Its Success?.- Jonathan Edwards on the Freedom of the Will.- The Accelerator and the Virgin: The Rise & Fall of Two Cults.- A