TABLES 



Page 



1. Cruise limits and periods , 



John R. Manning cruise 3E 



2. Summary of observations at BT lowerings 15-20 



3. Log of ship's weather observations 21-27 



4. Light penetration and water color observations 28-29 



John R. Manning cruise 33 



5. Summary of observations at BT lowerings 30-33 



6. Log of ship's weather observations 34-38 



7. Light penetration and water color observations 39 



Charles H. Gilbert cruise 31 



8. Summary of observations at BT lowerings 40-43 



9. Log of ship's weather observations 44-49 



10. Light penetration and water color observations 49 



