CONTENTS 



Introduction page 109 



Equipment and methods 120 



Wind 121 



Current and drift of the ship 125 



Temperature 134 



Salinity 159 



Seasonal changes 169 



Colour of the current 173 



Life in the current 175 



Phosphate content 1 80 



Conclusions ON THE results obtained 189 



Current 189 



Origin of the cool water 195 



Coastal upwelling 196 



Estimation of upwelling 196 



Depth affected by upwelling and water layers involved 197 



Effect of direction of coast-line 202 



Effect of the sea-bottom contour 203 



Effect of wind 205 



Effect of latitude 211 



Effect of seiche 212 



Speed of upwelling 212 



The evidence for the theory of subsidence 213 



Sinking of newly mixed water 214 



Centres of upwelling and other irregularities of the current . . . . 214 



Phosphate and organic production 218 



Colour of the current 221 



Boundaries of the Peru Coastal Current 222 



Comparison of normal and abnormal conditions on the west coast . . 229 



Comparison of conditions on the east and west coasts 234 



Summary 235 



List of References 241 



Appendices 248 



Index 273 



Plates XIV-XVI following page 276 



