Fig. 23. Paul and Soule preparing bottles for the water samples. These samples are collected in the depths of 

 the sea to be analyzed later in the chemical laboratory 



Fig. 24. Withdrawing samples of sea water Fig. 25. The biologist using a dip net from the "boom walk." The 



for chemical analysis. Such specimens boom walk consists of two thirty-foot booms with a net between and 



were obtained down to a depth of three enables the observer to collect specimens beyond the disturbance 



miles at some stations caused by the ship's wash 



26 



