155° 



Fig. 7. — H. M. Smith cruise 1. Solid lines, topography of 23. 6, 24.0, 25.0, 

 and 26.0 sigma-t surfaces, contour interval 20 M. Dotted lines, salinity 

 on the sigma-t surfaces, isohaline interval 0.1 °/oo. A. 23.6, B. 24.0, 

 C. 25.0, and D. 26.0 signna-t surfaces. 



29 



