o
ot
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x
ane
Nyon”
Yas
studied oy Anderson of o.1.7., who made observ: tions
on the Bikini corn.
Controls have heen studied
ccrefully with 250 k.v. x-reys and with water boiler
neuats.
at Los Alemos.
Tradescantia:
Inflorescence will be placed st
close stations and plants at far stations.
Dr.
Conger of Oak Ridge will be in charge of
this study.
smears of the pollen will be made
at 21 hours and four days after exposure (the
two clessical times of study) and some of the
Scoring of the chromosome breaks will be made
at Jantan.
This tyne of study is of perticular
importence in the stidy of neutrons as the
increase in breaks is not (?) linear in the case
of gemma rays when the dose exceeds 250 roentgens.
I oresume that the neutron studies with fission,
pile and cyclotron neitrons
such as have been
resorted in the literature are being continued.
“he tradescantia will be nlaced in the hemispherical
Stations where they will receive an estimated
10° +6 1019
than 30 gamma
neuts (largely fast) and not more
roentgens.
They will also be
placed in the cylindrical stations where they
will be exposed meinly to ganze
rays.
Mouse spleen-thymus weight decrease:
an excellent end novel idea,
This is
but it is the least
well exnlored of the biological tests (excent
for the inhaletion).
Carter at Los Alamos has
Studied this nroblem thoroughly with neuts. and
photons of different energies end has colibrated
the weight decrease in these lymphoid tissues
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