distance of sample from test site.
For stations nearest the
test site, values for the post test samples were several hundre
d
times greater than for the pre-test samples.
Since the counts
of “Fe(0H)3 scavenge” and "Ca-Sr oxalate" do not equal the
count of “whole sample" evidently all of the radioactive
materials were not removed by these processes.
A rain water sample was colleeted 33 hours after the
Mike shot in the lagoon off Eniwetok Island.
A 4%50-ce sample
was evaporated and counted on November 4, 87 hours after Mike,
using a Victoreen survey meter with a one-inch end window
tube,
window thickness 1.8 mg/cm“.
The maximum count vas
10,000 per minute.
4.2
Plankton
The plankton nets were 4+ meter in diameter and 2 meters
long.
The anterior section was cylindrical, the posterior
section conical with a detachable net end.
The plankton tows
were made in pairs, at the surface and during daylight hours.
One net of each
pair was constructed with No. 6 silk (74
meshes per inch) and the other of No. 12 silk (173 meshes per
inch).
Towing time was usually one hour and the distance
towed was about 14 miles.
Catches of plankton were small.
Exclusive of jelly fish the greatest volume of plankton in a
one-hour tow was 28 cc.
This value was obtained by decanting
and measuring the preservative and then subtracting this
amount from the volume of preservative and plankton.
A gross examination of the types of organisms present
~
2D ~