Fluorocein Dye Experiment Possibilities. 
A dye, like fluorocein, may be easier to follow than radio- 
activity in tracing diffusion and current effects in an oceanic 
ee ep A dye experiment should be done independently of 
other experiments because it will answer questions such as those 
regarding small scale turbulence. If the turbulence spectrum in the 
sea was known, it would facilitate solving other PR, The 
use of dye in an experiment preceeding the radioactive tracer experi- 
ment appears to be a good idea because it would be difficult to handles 
a megacurie of activity the first Lae If dye was used it could 
be used as a dry run for the radioactive experiment, i.e. the dye 
could be handled with the same equipment that would be used for 
(5) 
handling the megacurie of activity. 
Experience with Fluorocein Dye: Several pounds of fluorocein 
released at depths of 50 feet or more did not become visible at the 
surface of the ee In another experiment in an estuary of 
the Chesapeake Bay 50 gallons of concentrated dye was pumped in 24 
minutes into water 17 feet deep. In 15 minutes the dye had been 
diluted by a factor of 10° and in 60 minutes by a factor of 10°, It 
was not possible to trace it further with the equipment available. 
It appears possible to be able to trace very large dilutions of 
fluorocein. However, there may not be enough fluorocein made in this 
country to run an experiment in the open ocean in a volume 10 miles 
square by 100 feet ehigen From previous experiences, working 
with relatively small amounts of fluorocein, the isothermal layer 
was thick enough to permit expansion in 3 dimensions. It may take 
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