TABLES 



No. TITLE Page 



1. Sacramento River. Summation of Discharge of Sacramento River at Red Bluff and of the 



River's Principal Tributaries 38 



2. Low Water at Sacramento Gage Readings at Lowest Stage of Tide 40 



3. Range of Salinity in the Lower Reaches of Sacramento and San Joaquin Rivers in the Head of 



Suisun Bay in 1920 41 



4. Economic Life of San Francisco Wharves (built and removed to date) 63 



5. Economic Life of E.xisting San Francisco Wharves (to 1925) 64 



6. Untreated Wood Piles — Service Records to December, 1923 155 



7. Metal-covered Wooden Piles — Service Records to December, 1923 156 



8. Paint and Batten Protective Coatings on Wooden Piles — Service Records to December, 1923 157 



9. Creosoted Wooden Piles — Service Records to December, 1923 158 



10. Concrete Protection on Wooden Piles — Service Records to December, 1923 161 



11. Reinforced Concrete Piles — Service Records to December, 1923 162 



12. Reinforced Concrete Cylinders Placed in Open Caissons — Service Records to December, 1923 162 



13. Metal Supports — Service Records to December, 1923 162 



14. Treatments LTsed in Test Pieces Exposed in Large Creosoted Gates 164 



15. Comparison of Oil LIsed in Timber Treatment with Oils Extracted after 214 Years in the 



Water 165 



16. Relations Between Loss of Tar Acids and Physical Character of Creosote Oil after 166 



17. Description of Creosoted Test Pieces Attacked through L'ntreated Bait Pieces 167 



18. Loss of Creosote by Leaching and Evaporation 169 



19. Effect of Boiling Benzene on Creosote Oil 1 70 



20. Analyses of Oils after Exposure in Treated Wood and Open Dishes in the Air 170 



21. Comparison of Original and Extracted Oils from Small Test Pieces After Exposure in Sea 



Water 171 



22. Comparison of Oils Extracted from .Air, Water and Mud Sections of a Pile .\fter Four Years' 



Service 171 



23. Analysis of Wood Substance of Douglas Fir Sapling Before and After Treatment with Creosote 172 



24. ElTects of Chlorine on Teredos in Their Burrows 175 



25. Tests of L'ntreated Woods for which Resistance to Borer Attack is Claimed 179 



26. Tests of Patented Preservatives 180 



27. Tests of Special Chemical Treatments 181 



28. Rate of Boring of Teredo navalis in San Francisco Bay 232 



29. Summing Up Table 28 233 



30. Rate of Boring of Bankia Setacea in San Francisco Bay 234 



31. Summing Up Table 30 234 



32. Analyses of Wood and Borings: Series 1 241 



33. Analyses of Wood and Borings: Series 2 241 



34. Recalculations of Data of Tables il and 33 242 



35. Data of Table 34 Calculated to Percentages of Original Wood 243 



36. Activity of Teredo navalis. Experimentally Exposed in Various Salinities 257 



37. Survival of Teredo navalis, Experimentally Exposed in Various Salinities 258 



38. Survival of Teredo navalis, in Standing Water of Low Salinity in Aquaria 259 



39. Survival of Teredo navalis under Various Experimental Conditions in Aquaria 259 



40. Survival of Teredo navalis in Running and Standing Fresh Water 260 



41. Survival of Teredo navalis in Piles at Crockett During Period of Low Salinity, Season of 



1921-1922 263 



42. Date of First Settlement of Teredo Larvae in San Francisco Bay During Three Successive 



Years 286 



43. Rate of Growth of Ridges on Shells of Teredo at Goat Island 289 



44. Rate of Growth of Ridges on Shells of Teredo at Crockett 289 



45. Salinities Lethal to Limnoria 327 



