“…Ferrell, Turner and Overinan (1954) stated that monkeys exposed to whole-body X-ray doses of 400 r and 500 r show an increase in plasma volumes at the end of both the first and second post-irradiation days. In clinical studies on patients suffering from malignant reticulosis, Greenberg and Laszlo (1954) found that Xirradiation produced an increase in extracellular fluid and plasma volumes at the expense of the intracellular fluid volume. It seems llkely that the reduction noted in the haematocrit values among the cases in the present series may be primarily due to an increase in plasma volume, possibly as part of a more widespread disturbance of the intracellular-extracellular ff uid balance.…”