676 TRANSACTIONS OF SECTION I. 
altitudes, is in disagreement with the results obtained by calculation from 
Abderhalden’s extensive series of observations on rabbits. It is improbable that 
in this respect man differs so remarkably from lower animals. But the disagree- 
ment may be readily explained as due to the fallacies introduced in the experi- 
ments on man by the use of the CO method, which we have criticised elsewhere. 
As soon as active new formation of blood begins in the bone-marrow the errors 
of this method of estimating the blood volume are greatly increased. 
3. After their descent from Pike’s Peak, Douglas, Haldane, Henderson, and 
Schneider found in man at first an increase of blood volume above the normal 
level, followed later by a return to the normal. But our calculations from the 
figures found by Abderhalden for the blood volume of rabbits which were taken 
back from St. Moritz to Basle, show that the blood volume returned to the normal 
within three or four days, and was never increased, though the percentage of 
intravascular hemoglobin did not fall to its original level until the expiration of 
three weeks or more. This further divergence between the results obtained on 
man and animals is again more probably to be attributed to the use of the CO 
method in the former case than to the existence of any fundamental difference 
between animals and man. 
3. Natural Arrest of Hemorrhage froma Wound. By Dr. Joun Tarr. 
4. Simplified Mammalian Heart Perfusion. 
By Miss M. Macnaueuton and Dr. J. Tarr. 
5. Contraction of Non-oxygenated Mammalian Muscle at Temperatures 
ranging between 0° and 40° Centigrade. By R. J. S. McDowau 
and Dr. J. Tarr. 
SUB-SECTION OF PSYCHOLOGY. 
CHAIRMAN.—PRrRoFEssor J. H. Murrunap. 
THURSDAY, SHPTEMBERF il. 
The following Papers were read :— 
1. The Theory of Psycho-phystological Parallelism: its Absurdity and 
Stultification as an Hypothesis. By H. Wipon Carr, D.Litt. 
Absurdity means that, carried to its conclusion, the theory involves the 
logical contradiction that the part is the whole, quod absurdum est. 
Stultification means that adopted as an hypothesis it does not, as is supposed, 
leave the mind neutral in regard to all the alternatives, but by implicitly deny- 
ing the possibility of unconscious psychical states it obscures the reality it 
seeks to elucidate. 
