LIST OF FIGURES 



No. Page 



Frontispiece. Locations along the Atlantic coast reported herein... ii 



1. Normal cycle of temperature at surface and bottom along the 



string of observation posts for 1958 3 



2 . Grand Harbour, Grand Manan 4 



3. Portland Lightship 6 



4. Boston Lightship 19 



5. Georges Shoal, Texas Tower #2 26 



6. Nantucket Shoals, Texas Tower #3 29 



7 . Nantucket Lightship 31 



8. Woods Hole, Massachusetts 44 



9. Buzzards Lightship 46 



10. Ambrose Lightship 49 



11 . Texas Tower #4 (off New York) 56 



12. Barnegat Lightship 59 



13. Five Fathom Bank Lightship 67 



14. Winter Quarter Lightship 75 



15 . Chesapeake Lightship 83 



16. Diamond Shoals Lightship 91 



17 . Frying Pan Shoals Lightship 105 



18. Savannah Lightship 112 



IV 



