844 



BULLETIN OF THE BUREAU OP FISHERIES 



40 meters, with the surface water more dense over the bank (station 10348) than 

 over its seaward slope (stations 10349 and 10352), though some doubt exists as to 

 the salinity (hence as to the density) at the critical station (10349, p. 992). 



Thus, densities rule lower along the outer edge of the offshore banks, abreast of 

 the Gulf of Maine and off Nova Scotia to the eastward, than along the continental 

 slope that bounds the banks on the offshore side. The relationship at any given 

 date may be of the reverse order, either close to the surface as in July, 1916, or 



Meter 



280 



320 



Fig. 10 



-Density proQle crossing the continantal shelf in the offing of Shelburne, Nova Scotia, June 23 to 24, 1915. 



Corrected for compression 



along the 100-meter contour, as in July, 1914, However, we have never failed to 

 find the surfaces of equal density rising comparatively steeply from the outer part of 

 the shelf through the greater part of the depth zone there included, out across the 

 edge of the continent between the longitudes of Shelburne, Nova Scotia, and of 

 Cape Cod. 



To the east and north of our limits, and especially off the Newfoundland Banks, 

 this zone of mixture is not only heavier than the coast water on its inner side (or 



