-2- 



the stretch of the ceb.le, with those obtained from the un- 

 protected reversing therncmeters. The v&lues reed from 

 th^ wheel. v?ere found to be too low by 12 per cent + 3 per 

 cent. It is considered that, after correction, the depth 

 values obtained by vertical ].owerings may be relied upon 

 to + 5 per cent. ■ ' • 



Surface temperatures were obtained by dipping up a 

 sample of water in a canvass bucket and measuring the tempe- 

 rature at once in the shade. Sub-surface temperatures and 

 salinities were obtained by Hansen bottles and reversing 

 thermometers. 



SoTindings were made with 200 pound lead weight at 

 the end of the wire. . 



) 



Bottom photographs were obtained with a Swing deep- 

 sea camera. This device operated satisfactorily nineteen 

 times and failed to produce a usable negative fifteen 

 times. A small coring device was attached to the trigger. 

 This functjonei well and usually brought up a good core, 

 except, of course, from rocky bottom. 



A reduced scale model of the large Ewing coring 

 mf chine was used to obtain longer cores.' This device vdid 

 not oper'ite consisterntly; c week's work only yielded 

 five cores. 



Plankton was collected with a series of six half- 

 m'ter nets and tvro Clarke-bumpus plankton 5am.plos. 

 ^ Positions wore fixed by taking bearing on shore 



