{"value"=>"<p>Summaries and diagrams present four distinct groups of documents pertaining to statistical studies of sickness and mortality within variables including corps or military department, season, geographic location, soldier rank, or military campaign. These four groups are Abstracts and deductions, Summaries of diseases and casualties (along with supporting documents), and Diagrams of sickness and mortality, and Tables of sickness and mortality. Most summary and diagram documents were originally contained within a package entitled “Summaries and Diagrams, relating to the sickness and mortality of the armies of the United States.\" Some diagrams provide data for the British and American armies prior to the Civil War, spanning the period 1793 to 1859. Date spans represent the period for which data was collected.</p>"}