EDITORIAL      



A 20th Anniversary Message from the International 

      Commission on the History of Mathematics 

      Joseph W. Dauben ....................................................... 1



DEDICATION      



Bartel Leendert van der Waerden 

      Günther Frei ........................................................... 5



On Euler's Contributions to the Four-Squares Theorem 

      Herbert Pieper ......................................................... 12



The Early History of the Moment Problem 

      Tinne Hoff Kjeldsen .................................................... 19      



Bernard Bolzano---Not as Unknown to His Contemporaries as Is 

      Commonly Believed? 

      Gert Schubring ........................................................ 45



Euler's Troublesome Series: An Early Example of the Use of 

      Trigonometric Series 

      Louise Ahrndt Golland and Ronald William Golland ...................... 54



The Development and Understanding of the Concept of Quotient Group 

      Julia Nicholson ....................................................... 68



NOTE      



Harmonic Means and Diophantus 1.39 

      William C. Waterhouse ................................................. 89      



SOURCE      



New Archives of American Mathematics Collections 

      Frederic F. Burchsted ................................................. 92



REVIEW      



Indo-European Numerals, edited by Jadranka Gvozdanovi\'c 

      (Jens Høyrup) ......................................................... 99



      ABSTRACTS.............................................................. 104                              

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