IV CONTENTS 



Page 



15. Intake coupling for float well 27 



16. Cleaning tool for float well 27 



17. Schematic view of installation of standard automatic tide gage 33 



18. Standard disk tidal bench mark 38 



19. Tide curve and comparative note (standard gage) - 43 



20. Installation portable automatic tide gage on fish trap stake 55 



21. Installation portable automatic tide gage against rocky cliflf 56 



22. Tide curve and comparative notes (portable gage) 59 



23. Form 455, Comparative readings 62 



24. Form 138, High and low waters (front) 64 



25. Form 138, High and low waters (back) 65 



26. Form 362, Hourly heights 67 



27. Form 248, Comparison of simultaneous observations 72 



28. Graph for obtaining tide reducers directly from marigram 79 



29. Form 457, Density and temperature 82 



30. Graduations of hvdrometer scale 84 



