10
by using a 100/110-ml caseta volumetric flask instead of a graduated cylinder.
All samples except fish were processed aboard
ship immediately after being collected.
PFish were frozen aboard
ship, dissected and dried at the Enivetok Marine Biological Laboratory, and ashed and counted at the University of Washington.
The water supply for the probe tank for continuous monitoring,
instead of being taxen from the fire mains as on the Walton,
was sucplied by & Marlow Centrifugal Pump, Model No. 12, HEL-9,
operated at its full capacity of 50 gallons per minute.
Chemical
pum s cf lesser capecity which had been furnished with the tank
were tried but were
inadequate.
used for intake and discharge.
and hull of the
One and one-half-inch pipe was
The pipe wae welded to the deck
_
.
ship and the free end of the intake pipe was
held against the force of the water by a chain leading to 8s
stanchion on deck.
Fven with these precautions and generally
good sailing conditions,
the pipe broke on the last day of the
cruise.
METHODS OF ANALYSIS
All counting, with the exception of fish sampies, was done
aboard ship within a few hours after the time of collection.
Counting Fquipment.
Samples were prepared on 14-inch stain-
less steel plates and counted with 2-inch Anton tubes in a 3-inoh
lead Anton pig with Nuclear-Chicago Model 181 scalers.
ground varied from 17.3 to 37.1 c/min.
Correction Factors.
The same
Baok-
POE ARCHIVES
correction factors vere used
as for the Walton data, the details of which are given in UWPL-46.
Mt