xxii PREFACE. 



great obligations to these gifted young women for the many improvements 

 in the book due to their accuracy and alertness. In addition to all this help, 

 the author has devoted a large part of his time for fifteen months to the 

 proof-sheets, comparing them with his original notes, checking computa- 

 tions, comparing reports and readers' suggestions with the original papers, 

 adding reports on current papers, repeating the work done on the manu- 

 script of examining minutely all the reports for results needing citation 

 elsewhere by cross-reference, and inspecting every change made in the proof. 

 Readers are requested to supply, for insertion in a concluding Volume 

 III on quadratic and higher forms, residues, and reciprocity laws, notices of 

 errata or omissions, as well as abstracts of the few papers marked by the 

 symbol * before authors' names to signify that the papers were not avail- 

 able for report. 



L. E. DICKSON 

 APRIL, 1920. 



