136 THE OCEAN FLOOR 



by Figure 43, showing how the reversing water bottle 

 was stopped at the desired height above the bottom by 

 means of an extra weight, a dynamometer on deck 

 announcing when the bottom was reached. 



It does not appear improbable that the undermost 



Ocean floor 



Fig. 43. Water sampling near bottom 



water bottle attached to the wire one meter above the 

 weight could have accidentally enclosed contaminated 

 water. (Such an objection cannot be raised against 

 measurements in the Indian Ocean, where the distance 

 between water bottle and weight was four meters.) 

 However, this disturbing effect could not have extended 



