PHYSICAL OCEAN 0 GRAPH Y OF THE GULF OF MAINE 
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tion at greater depths from about 34 per mille at the bottom of the western and 
northeastern parts of the trough to about 34.8 per mille in the southeastern part, 
irrespective of slight differences in depth. 
Thanks to the vertical homogeneity of the water at this season at depths less 
than 100 meters, the bottom salinity of the coastal zone was then very uniform from 
station to station (about 32.3 to 32.6 per mille at most of the stations) in depths of 
40 to 100 meters. The bottom water proved equally uniform on Georges Bank, 
where the extremes recorded (32.6 and 32.8 per mille) were only 0.2 per mille apart 
