THE EQUIPMENT 



41 



Oceanographers are also able to explain certain peculiarities of 

 ocean-currents by the contour of the ocean-bed. But enormous 

 areas are still unexplored. 



On the wall of the control-room hangs the German multithermo- 

 graph which was referred to when we looked into the Stevenson 



ToRREsoN Observing a Pilot-balloon 

 With the specially designed theodolite loaned by the United States Navy. 



meteorological shelter. Below it is an inflation-balance for use 

 in connection with soundings of the upper atmosphere. Rubber 

 balloons filled with hydrogen are released from the deck. These 

 extremely light globes are deflected from their upward course by 



