most of the city; the hills prevented a similar overall view in Nagasaki.
Hiroshima impressed itself on one's mind as a vast expanse of desolation;
but nothing as vivid was left in one's memory of Nagasaki.

When the observers began to note details, however, striking differences
appeared. Trees were down in both cities, but the large trees which fell
in Hiroshima were uprooted, while those in Nagasaki were actually snapped
off. A few reinforced concrete buildings were smashed at the center in
Hiroshima, but in Nagasaki equally heavy damage could be found 2,300 feet
from X. In the study of objects which gave definite clues to the blast
pressure, such as squashed tin cans, dished metal plates, bent or snapped
poles and like, it was soon evident that the Nagasaki bomb had been much
more effective than the Hiroshima bomb. In the description of damage which
follows, it will be noted that the radius for the amount of damage was
greater in Nagasaki than Hiroshima.



GENERAL DESCRIPTION OF DAMAGE CAUSED BY THE ATOMIC EXPLOSIONS


In considering the devastation in the two cities, it should be remembered
that the cities' differences in shape and topography resulted in great
differences in the damages. Hiroshima was all on low, flat ground, and was
roughly circular in shape; Nagasaki was much cut up by hills and mountain
spurs, with no regularity to its shape.

In Hiroshima almost everything up to about one mile from X was completely
destroyed, except for a small number (about 50) of heavily reinforced
concrete buildings, most of which were specially designed to withstand