Fig. 21. Quarter-deck of the Carnegie during an oceanographic station when the ship is hove to and the instru- 

 ments are lowered into the sea to collect samples of the bottom and to take temperatures and sea water for 

 analysis 



Fig. 22. Captain Ault about to remove a ' Nansen lx)ttle" which contains a sample of sea water obtained from 

 the deep. The thermometers attached to the bottle give the temperature at the level at which the bottle was 

 reversed 



25 



