Smithsonian Report, 1 963. — Wallen 



Plate 2 



1. Concrete package containing radioactive wastes ready to be damped into the Pacific 

 Ocean. In a limited area these packages may accumulate and remain a potential hazard 

 to local plants and animals. 



2. Using a pump and hose method, seawater containing rliodamlne dye is pumped from 

 as much as 300 feet below the surface of the ocean to the deck of a ship where its con- 

 centration is determined. As a method of study of distribution of particles in the sea, 

 rhodamine is substituted for the possibly hazardous radioactive isotopes. 



