Fig. 8.3. Cage and water-bottle holder.
In the second generation, no consistent effect on body weight attributable to the field was seen
throughout a 108-day observation period. The vertical-exposed group, however, again exhibited a
higher mortality; about 6% of the animals alive at weaning failed to live to the final day of observation
due to the presence of the electric field. In the third generation, the exposed animals had higher body
weights, particularly in the horizontal exposed group. At 49 days after birth, the males and females in
each exposed group were significantly heavier than their respective controls. At 119 days after birth
only the females in the horizontal-exposed group were significantly heavier, but this was part of a
consistent trend for that group. Again we saw an increased mortality in the vertical-exposed group-10%
of the weaned animals failed to survive to the end because of low-frequency EMFs were also reported
by Grissett (35).
EMFs can alter the growth and development of some tumors. Batkin and Tabrah found that the
development of a transplanted neural tumor could be affected by a 12-gauss, 60 Hz EMF (36); they
reported a slowing of early tumor growth in the exposed mice. We found that 5 kv/m, 60 Hz, had no
material effect on the development of Erhlich ascites tumor in mice; the average length of time between
tumor implant and death was not altered by the fields.
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