A portion of each tow was preserved in formalin for purposes
of identification; the remainder was drained, placed in plastic
bags and frozen for shipment to Christmas Island.
Five 30-minute hauls were made with the Isaacs-Kidd midwater trawl to depths of approximately 70 meters.
In most cases
surface tows made at night with the one-meter plankton net provided greater catches of small fish than did the trawl.
Nansen bottle casts were made at each long-line station.
During Cruises 56 and 57 one~liter sea water samples were obtained at 25,
50,
100,
and 300-meter depths.
During Cruise 59
Nansen bottle casts were made to obtain water samples for radiological analyses.
Samples were obtained from about 50 meters in
the area above the thermocline,
and a second sample from the
region of the thermocline, between 90 and 130 meters,
Mined by the bathythermograph casts.
as deter-
Four Nansen bottles were
placed close together on the cable above the thermocline,
close together in the thermocline,
group of four bottles were pooled.
four
and the samples from each
In addition, a five-gallon,
surface water sample was obtained at each water station and at
other locations as shown in Figure 1 and Table 1.
All water
samples were stored in polyethylene containers and shipped to
Seattle for analysis.
The water samples were filtered through a Millipore filter
47 mm in diameter with a pore size of 0.451 to collect the