274 
PULMONARY MODELS 
make a plea to all of those who are doing some 
work on animal models, that each time you as- 
certain very carefully that your model is indeed 
comparable to the human. We might very often 
draw some conclusions which, in fact, are not 
clearly applicable to what we are attempting to 
do. I guess one of the spirits of this conference 
(which, as you know, was organized by a health 
agency, for humans) is perhaps to demonstrate 
that sometimes observations which are made in 
animals are not quite applicable to what we ob- 
serve in man. 
M. L. PovAR, Brown University, Providence, 
Rhode Island: I don't have a question, but just 
a comment. What you said just now is ex- 
tremely appropriate because of some studies 
that are being done back at the Rhode Island i 
Hospital in Providence. They were doing some 
ventilation studies in the dog and were getting 
very bizarre results compared with humans and ' 
were about ready to give up when we intro- i 
duced the baboon. Then the results began to du- ' 
plicate what they had found in man. So perhaps ! 
in this case, one animal that is normally in a ; 
horizontal position and another animal that is 
normally in a vertical position ventilate quite a 
good deal differently. 
Dr. Will : It has been shown by some work- 
ers at the Mayo Clinic that the dog in the erect ! 
position is virtually identical to man. | 
