The Index of Refraction of Seawater

Block 20 cont.tables presented have been performed suggesting an overall accuracy of the tabulated index values of about 3 x 10~s at atmospheric pressure and 1 x 10~4 at higher pressures.The extreme values encountered were 1.32921 and 1.36844, while the average slopes of the index surface, over the range of the variables considered, are An/As « 0.009/43°/ 00 , An /At« -0.002/30°C, An/AA« -0.013/300 nm, An/Ap« 0.015/1100 kg/cm 2 .Three dimensional diagrams provide complete views of the index of refraction surface.The requirements necessary for obtaining salinity and specific gravity directly from measurements of the index of refraction, for oceanographic purposes have been examined.