APOLOGY 



The plans for this book originated in an ad hoc committee, made up 

 of persons who in some manner or another had been associated with 

 Kluyver. Most of its members were pupils: they are: Miss Dr. M. 

 P. Lohnis, Dr. L. E. den Dooren de Jong, Dr. B. Elema, Mr. K. 

 W. H. Leeflang, Chem. E., Prof. Dr. T. Y. Kingma Boltjes, Mr. E. 

 van Olden, M. Sc, Dr. L. H. G. Perquin, Dr. J. W. M. la Riviere, and 

 Dr. W. Verhoeven. Following his appointment as Kluyver's successor, 

 Prof. T. O. Wiken accepted an invitation to join the committee, which 

 also included the author Mr. A. F. Kamp, LL.M. The editorial activi- 

 ties were taken charge of by Mr. Kamp, Dr. Verhoeven and Dr. la 

 Riviere. Mrs. A. G. Waisvisz-Merens acted in an administrative 

 capacity. 



We, the committee members, keenly realize that the result of our 

 labours could only have been attained by virtue of the aid and coop- 

 eration of many persons outside our own group. We are particularly 

 indebted to Prof. Dr. C. B. van Niel, former associate, friend, and 

 colleague, who has shouldered the task of the English translations, 

 and who, through his intimate contacts, extending over more than 

 thirty years, was fully conversant with Kluyver's work and thought. 

 For this reason we appreciate that he has also been willing to outline 

 the significance of Kluyver's contributions to science. 



For his sketch of the early years, which ushers in the biographical 

 memoir, we extend our thanks to Dr. W. E. van Wijk, a close friend 

 of the pre-college clays; we are obligated to Prof. Dr. A. van Rossem 

 for the extensive and lively remembrances he has contributed, especi- 

 ally those pertaining to the years Kluyver spent in the Netherlands' 

 East Indies, a phase with which Van Rossem was thoroughly familiar. 

 Prof. Dr. E. G. Wassink, an initial member of the 'Biophysical Group' 

 in LTrecht, has kindly supplied information concerning Kluyver's par- 

 ticipation in the activities of this group. For the rest, the memoir com- 

 prises and edited version of the individual contributions of those com- 

 mittee members who are pupils of Kluyver. We consider the con- 



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