3.
Radioautographs produced with the new techniques should be
made to trace the paths of the active materials.
This work should amplify
the gross radioautograph work as attempted during and immediately sub-
thine atiment
sequent to the field work.
4.
Tissue study of a basic nature is needed to know the normal
histological and cytological pattern of some of the key organisms,
This
sort of study is necessary before comparative studies may be made on changes
that may have been induced by tha fission products,
5
Experiments under controlled laboratory conditions should be made
to trace the cycles of radioactive elements from water to plants to animals.
The degenerative effects on the organisms should be noted and described.