6 ACKNOWLEDGEMENTS This report was published as Chapter Nine of part four of the series of studies of natural resources prepared for the Interior and Insular Affairs Committee, House of Representatives, United States Congress. Part four of the series was prepared under the supervision of Arthur M. Piper of the Federal Survey. The permission to publish the chapter on Florida was kindly given by Dr. Nelson Sayre, Chief, Groundwater Branch, U. S. Geological Survey. The subject matter and the scope of the project is at the heart of the delegated responsibilities of the United States Geological Survey, but heavy responsibilities and limited manpower keep the Survey from making many studies that are needed. The activities required in the preparation of these reports were undertaken by members of the regular staffs of the various branches of the U. S. Geological Survey, but much of the Work accomplished was a result of overtime activity. Many individuals have participated in the preparation of the report, "Ground Water in Central and Northern Florida." Those with the chief responsibility for preparing the report are listed as authors, but many individuals in the various offices prepared diagrams, tabulated data or contributed to the report in other ways. In particular A. O. Patterson, District Engineer, Surface Water Branch, Ocala, Florida, and Ralph Heath, Acting District Geologist, Groundwater Branch, Tallahassee, Florida, contributed specific items to the report.