FOREWORD 



With this edition of the Unclassified List of Reports, the Model Basin 

 is beginning a new system of publishing report information. Heretofore, the 

 catalogs of Model Basin Reports have been kept up to date with supplements 

 issued at irregular intervals. 



The Model Basin now plans to issue quarterly loose-leaf supplements. 

 These will be sent automatically to all who have a copy of this unclassified 

 list. 



This list is divided into four sections, each numbered separately, as 

 I-l, II-l, III-l and IV-1. Section 1 contains the regular series of TMB formal 

 reports numbered consecutively without any preceding letter designation. 

 Section II contains the R-series, which was discontinued in 1947. Reports 

 in this series are designated as R-1, B-45, etc. Section III contains the 

 C-reports which have been declassified. These reports still carry the C 

 designation preceding the number. Section IV contains the translations, 

 which are numbered as T-1, T-25 and so forth. 



Numbers listed without titles are either unpublished or not available 

 for distribution. Missing numbers in the list are for classified reports not 

 included in this list. 



This first list, TMB Report 1160, supersedes TMB Report 597. Un- 

 like Report 597 it no longer carries an author and subject index. 



