1. Acknowledgments

   Acknowledgments Pages: 4 - 4

2. Preface and introduction

   EditorialNotes Pages: 5 - 9

3. After thirty years

   • G. Mannoury

   Introductory Speeches Pages: 13 - 14

4. Introductory address

   • Philipp Frank

   Introductory Speeches Pages: 15 - 19

5. Methode axiomatique et methode operationnelle

   • Jean Piaget

   Epistemology Pages: 23 - 43

6. La genese de l'Idee de hasard et la resistance du reel aux operations

   • Bärbel Inhelder

   Epistemology Pages: 44 - 50

7. Tendances constructives en logique moderne

   • P. Fevrier

   Mathematics And Physics Pages: 52 - 58

8. Descriptions operationnelles en physique moderne

   • Jean-Louis Destouches

   Mathematics And Physics Pages: 59 - 64

9. Begriffsbildung und Operationalismus

   • D. L. Székely

   Mathematics And Physics Pages: 65 - 70

10. La refresentation mathematique des observables

    • Pius Servien

    Mathematics And Physics Pages: 71 - 75

11. La methode historique

    • Georges Bourgin

    Sociology And Linguistics Pages: 79 - 83

12. Une enquete sur l'application du droit dans la pratique

    • Roger Houin

    Sociology And Linguistics Pages: 84 - 90

13. Towards a new grammar

    • A. J. J. de Witte

    Sociology And Linguistics Pages: 91 - 101

14. Signifik und Heuristik

    • F. Denk

    Sociology And Linguistics Pages: 102 - 107

15. Combination of methods

    • J. Clay

    Concluding Remarks Pages: 111 - 119

16. Didactic problems in significs

    • G. Mannoury

    Didactic And Methodological Problems Pages: 123 - 126

17. Les activites mentales en rapport avec les expressions symboliques logioques et mathematiques

    • Jean Piaget

    Didactic And Methodological Problems Pages: 127 - 145

18. Significs and mathematical teaching

    • S. J. Geursen

    Didactic And Methodological Problems Pages: 146 - 147

19. Formalisierung der einheitswissenschaft mit dimensionsbegriffen von variabler Exaktheit

    • David L. Székely

    Didactic And Methodological Problems Pages: 148 - 170

20. Die mathematischen Bgriffe und ihr Ausdruck

    • F. Denk

    Mathematics And Physics Pages: 173 - 180

21. Ist Mathematik eine Sprache?

    • Paul Lorenzen

    Mathematics And Physics Pages: 181 - 186

22. Die Ausbildung der mathematischen Zeichensprache und ihr Einfluss auf die Entwicklung der mathematischen Problemstellung

    • Emil J. Walter

    Mathematics And Physics Pages: 187 - 189

23. A heuristic model for the growth process of modern physical science

    • Gerald Holton

    Mathematics And Physics Pages: 190 - 202

24. Quantum mechanics and its models

    • H. J. Groenewold

    Mathematics And Physics Pages: 203 - 209

25. Formal systems and mental activity

    • B. H. Kazemier

    Mathematics And Physics Pages: 210 - 219

26. Main tendencies in present-day physics

    • J. Clay

    Mathematics And Physics Pages: 220 - 225

27. Ways of interpretation. A didactic study

    • A. J. J. De Witte

    Linguistics And Sociology Pages: 229 - 237

28. Ursprung und Entwicklung, Typen und Funktionen der Zeichen

    • Karl DöHmann

    Linguistics And Sociology Pages: 238 - 245

29. Non-verbal responses to verbal stimuli

    • P. H. Esser

    Linguistics And Sociology Pages: 246 - 258

30. Modes d'expression en sociologie et en ethnologie

    • Maurice Leenhardt

    Linguistics And Sociology Pages: 259 - 264

31. Neutralite

    • Georges Bourgin

    Linguistics And Sociology Pages: 265 - 269

32. Semantic aspects of sociological studies

    • A. C. Leyton

    Linguistics And Sociology Pages: 270 - 278

33. Linguistic problems in recent social research

    • Vladimir Cervin

    Linguistics And Sociology Pages: 279 - 281

34. Resume des interventions

    • Ch. Perelman

    Interventions Pages: 285 - 289

35. Non-scientific elements in the development of science

    • H. J. Groenewold

    Explanatory Introduction Pages: 293 - 311

36. The ideological background of the foundation of mathematics

    • G. Mannoury

    Mathematics And Physics Pages: 315 - 317

37. Some philosophical aspects of science

    • P. W. Bridgman

    Mathematics And Physics Pages: 318 - 326

38. Quelques remarques subjectives sur l'objectivite en sciences et en philosophie

    • S. Gagnebin

    Mathematics And Physics Pages: 327 - 334

39. The role of authority in the interpretation of science

    • Philipp Frank

    Mathematics And Physics Pages: 335 - 338

40. The role of the irrational in the development of logic

    • Jørgen Jørgensen

    Logic Pages: 341 - 348

41. The formal structure of action

    • L. Apostel

    Logic Pages: 349 - 356

42. Irrational elements in some theories of life

    • P. Raven

    Biology And Psychology Pages: 359 - 363

43. De quelques reactions emotionnelles irrationnelles chez l'enfant et notamment chez l'enfant slave

    • C.-M. Lajberich

    Biology And Psychology Pages: 364 - 368

44. A. “Verification” of statements in psychology

    • D. Vuysje

    Biology And Psychology Pages: 369 - 372

45. B. “Verification” of statements in psychiatry

    • P. H. Esser

    Biology And Psychology Pages: 373 - 377

46. Aspects of some results of experimental phonetics

    • L. Kaiser

    Phonetics Pages: 381 - 384

47. The role of the irrational in the development of phonetics

    • A. J. J. de Witte

    Phonetics Pages: 385 - 386

48. The role of the irrational in sociology

    • Alvin C. Leyton

    Sociology Pages: 389 - 398

49. De quelques regles d'interpretation des elements irrationnels de la psycho-sociologie des peuples par l'analyse psycho-linguistique des vocables et des reactions sociales qu'ils provoquent, notamment chez les Slaves

    • Emile Sicard

    Sociology Pages: 399 - 407

50. Gerrit Mannoury

    • The Dutch Members of the General Editorial Commitee

    Obituary Pages: 409 - 413