San J®se Project 
s®pt, 2o» 1944 
Colonel Robert D. McLeod, Jr. 
Ghief of Technicel Division 
m Jose Project 
Dear Sir* 
Observation of the salmi life in ares F following the three experi¬ 
ments in that area on August 21, 22, and 23, 1944, showed practically eag¬ 
lets extermination of all individuals. The only exception is noted below. 
Specimens examined included! The Ant eater and Spiny rat among Mssaaalsj 
Several species of birdsj One species of Frogj Two species of Snakes and 
five species of Liaards among the Reptilesj A species of £el and two other 
species of Fishf Several types of Insects; Several species of Crabs and 
Shrimp®} Earthworks| And a few species of Lane Ilusea. The habitats of 
these various kinds of animals indicates that they were killed all the way 
from the bottom of the streams to the tops of the trees (mom! than 50 ft). 
Many more individuals and more species, particularly among the birds 
and insects would have been found, except for a 5 inch ($} rein that occurred 
about seven hours after the first experimental test and approximately seven 
hours before the area was personally examined. This rain was heavy enough to 
beat the feathers straight on the larger birds and make the smaller birds 
and and- insects almost impossible to find. The stream draining this area 
raised in flood two feet and carried away many dead animal © in this minor 
flood. 
The aquatic animals, killed by the tests were washed far downstream, 
so that the personal collections of those species in the area was from drift 
along the stream. This extra amount of water also ameliorated the effects 
c® the main stream by dilution of the saturated water by such a large volume 
of rainwater in addition to the normal. Later examination of the stream 
showed complete extermination of animals for a distance of only approximately 
500 yds. below the area. Proof that this limit of stream sterility applied 
to all species of aquatic animals in the stream was destroyed by the flash 
flood mentioned above.. 
In general it may be said that all animals in the area, at the time of 
the experiment were killed, with the except ion of some of the ants in cer¬ 
tain spots. In their case.the complexity of their smaller, deep underground 
tunnels, was probably the feature that allowed them to survive this non-per¬ 
sistent agent. 
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