128 



Chapter VIII 



been made since the experiments of Morawitz and Masing which we 

 are about to describe. Douglas (8) in Tenerifte obtained the following 

 data upon my own blood. 



Cambridge. 



Feb. 



5 



6 

 21 



Mean for. 



March 21 



23 



25 



100 

 100 

 100 



100 



103 

 105 

 113-5 



185 

 185 

 185 



185 



1017 

 1053 

 1025 



1032 



Orotava (sea level}. 



995 

 1000 



191 

 194 

 210 



144 

 157 



5220 

 4770 



Canadas (7000 feet}. 



The last two columns indicate that in my own case there was no 

 increase in the amount of haemoglobin, but from some cause or other 

 a concentration of the blood. 



To return however to Morawitz and Masing, they showed that an 

 appreciable rise took place in the metabolism of the blood itself, as 

 the result of bleeding to the extent of 400 c.c. To put this in another 

 way, if the body is called upon suddenly to make haemoglobin to the 

 extent of 8 % of the haemoglobin in the body, the formation of young 

 corpuscles with high metabolism will be sufficient to be appreciated 

 by their desire for oxygen. The experimental procedure was to 

 shake the sterile blood, incubate it for 5 hours, at the end of which 

 time the oxygen in the blood was measured by a gas analysis apparatus. 

 Normal blood would have lost less than '01 c.c. of oxygen per c.c. of 

 blood, while that from the patient after bleeding would have lost more 

 than *01 c.c. of oxygen. 



If then there were at high altitudes a formation of new blood, 

 erythrocytes corresponding in quantity to those in 400 c.c. of normal 

 blood, the blood would acquire the power of a considerable degree of 



