This second volume of the Harvard Survey of Crime discusses the data on criminal administration available now and the data which should be made available in the future. Sam Bass Warner concludes that hitherto most statistical information in regard to the administration of criminal justice has been unsatisfactory; and he then demonstrates what such statistics might achieve and how they could be made to serve useful ends if collected and compiled with due care and forethought. His system of criminal court statistics as embodied in the last chapters will interest many readers for just this reason and also because in advancing some of the features of his scheme he had first to criticize and discard many current practices and ideas. His plan, it is interesting to note, has already been adopted by two states.