TABLE OF CONTENTS. 



PAGE. 



Introduction 3^1 



Summary of climatic data on southern Florida 322 



Weekly air-temperature record at Tortugas 3-3 



Daily water-temperature record at Fort Jefferson, Tortugas, from June 16, 191 1, to June 16, 1912 324 



Temperature records for means of ten-day periods 331 



Dry Tortugas, Jan. 10, 1879, to Mar. i, 1907 33' 



Key West, Jan. 10, 1878, to Oct. 27, 1890 333 



Carysfort Reef, Sept. 17, 1878, to Dec. 31, 1899 333 



Fowey Rocks, Mar. i, 1879, to Dec. 31, 1912 335 



Salinity and temperature near Bermuda, the Bahamas, and Florida 337 



ILLUSTRATIONS. 



Figure 7. Map showing stations at Fort Jefferson, where water-temperature readings were made 325 



8. Map of Florida coral reef tract showing position of Dry Tortugas, Key West (Sand Key Light- 



house), Carysfort Lighthouse, and Fowey Rocks Lighthouse 337 



9. Map showing stations at which salinity and temperature records were made by the steamer Bache 



near Bermuda, the Bahamas, and Florida 339 



320 



