CLARK, G. 
place which has certain properties and certain functions, and another 
center in another place. I wonder if there is not considerable over- 
lapping in these centers. For example, there are two problems that 
have come up with shivering and panting. It is possible to control 
shivering by stimulation in the septum, which is certainly not in the 
posterior hypothalamus, and it is possible to inhibit shivering by 
stimulation in the anterior hypothalamus, which is far from the 
posterior hypothalamus. The other thing is the problem of panting. 
That is certainly a controversial problem, whether panting can be 
produced by heating or stimulatir^ the anterior hypothalamus. 
There is not general agreement on that, is there? 
DR. CLARK: No, there is not. Magoun, Harrison, Brobeck, and 
Ranson (1938), when they did that, were getting it routinely. I saw 
many of their animals and remember their rectal temperatures; 
they would be panting with a body temperature as low as 35 C. 
Of course, the Scandinavian workers (Strom, 1960) state that they 
had a hard job, and I do not know whether they ever saw panting or 
not. Do you know. Dr. Hensel? 
DR. HENSEL: Do you mean Andersson? 
DR. CLARK: No, Idonot mean Andersson. I mean the von Euler 
group, using diathermy in cats. 
DR. HENSEL: I think so. I think he saw panting. The only thing 
he could not see was the vasoconstriction during cooling. As far as 
I remember, he could see panting. 
DR. FREEMAN: But it was very uncommon in his animals. 
DR. HENSEL: Yes. 
DR. LIM: And also in Harcfy's work? 
DR. CLARK: Hardy was getting panting in the dog quite readily, 
and I have been doing some heat experiments with cats and oc- 
casionally getting it, in animals under chloralose and animals under 
urethane and animals under both. I have had trouble getting 
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