}
Figure 18,
[tf 3 2.
(upper).
Autoradiograph actual size of Biijiri-
Rkojoa dredged sand on 3/4-inch scotch tape.
Figure 18, (middle). Photograph, 1.8x, of the same sand
preparation partially illuminated from below through a positive
transparency of its own autograph.
Figure 18,
(lower).
Photomicrograph, 20x, of the large radio-
active particle near top center of preceding figure.
This
irregular, chalky particle weighing 0.6 mg, when removed to a
plate on May 18, 1953, counted 5,300/m in the Nucleometer.
- 89 -
eo VESTS