CAXADIAX FISHERIEi< KXrEDlTlOy, 191',-1-J 369 



Sect'on XVII, Staiions Go-7o. 



The section runs from station 05 off Canso in an easterlj- direction to station 75 

 in deep water, and crosses the Canso bank and Banquereau. 



Saliniti/. — The traces of coastal water at the surface at station 5G are mentioned 

 labove. Intermediate water is fomid at the surface as far seawards as station 71. 

 Near the coast it goes down to 75m., and the 32 'y^') isohaline runs in a slanting 

 direction, cutting the surface at station 75. Bank water occupies the bank and the 

 .channels, and from the outer edge of the Banquereau there is a layer of water about 

 '30m. thick, thinning out towards the surface until it is restricted to the upper 10m. 

 at station 75. Slope water occupies the sea^\ard slopes of the Banquereau, and 

 Atlantic water is found at stations 72 to 75 in depths of 13O-220m. to 55-325m. at the 

 last-montioned station. 



Temperature. — There are two minima with temperatures below 2° C, one occupy- 

 ing the banks and the channels and the other situated at a depth of 30-80m. at stations 

 72 and 73. The position of the latter minimum is almost identical with that of the 

 'conspicuous minimum at station V 12 of the spring cruise. The conditions seem to 

 'be similar to those found in the spring. The course of the current of cold water seems 

 to be the sartie, and the temperature over the banks to the west shows that the current 

 of cold water is later on deflected to the west, as was found in the spring. The surface 

 temperature has a minimum over the edge of Banquereau, and from there it increases 

 ^ery slowly towards the coast, and more rapidly seawards. The 8° isotherm runs 

 horizontally, though somewhat undulating, at a depth of about 25m., from the coast 

 •to station 73, where it trends vertically, and at station 75 runs at a depth of 325m. 



Section XYIII, Stations 75-70. 



The section runs in a northerly direction from station 75 of the foregoing section 

 to station 79, towards the slopes of the Xewfoundland banks. 



Salinity. — Off the mouth of the Laurentian channel we find intermediate water 

 at station 76 from the surface down to a depth of 35m. It covers the surface to a 

 little north of station 77. Bank water is found at the surface in the northern and 

 southern parts of the section, at station 76 it goes down to 75m. The layer of bank 

 water is very limited in extent, only 10 to 30m. This seems to be due to the influence 

 of the superficial intermediate water from within, and the slope water from without, 

 which latter forces its way up the Laurentian channel at a considerable depth. The 

 deeper parts of the section are almost exclusively occupied by slope water, and the • 

 Atlantic water is limited to the southernmost station (station 75) at a depth of 60 

 to 325m, 



Temperature. — The surface temperature decreases from the south tow-ards the 

 banks, from 16° C. to about 13° C. At station 76 we find a minimum with tempera- 

 tures below 2° C. This minimum is most probably the same as that found in section 

 XVII, stations 72 and 73. The course of the 8° isotherm is similar to that in section 

 XVIT, running horizontally at a depth of 30-40m. in tlie northern part of the section, 

 trending vertically at station 76. The minimum lies in tlie deeper part of the bank 

 water, and the slope water has mostly a temperature between -1° and 6° C. 



Section XIX, Stations 79-S3. 



The section runs from station 70 of the foregoing section in a northwesterly 

 direction to station 83, crossing St. Pierre bank. 



