270 



Chapter XVIII 

 Values of K* (Barer oft). 



It is clear therefore that as a rough and ready index of effort in 

 climbing, the maintenance of a rate which just fell short of making 

 one breathe through the mouth served its purpose, in that it caused 

 changes in the chemistry of the blood which were identical within 

 the limits of our experiments. 



I have dwelt upon the identity of the results obtained climbing 

 1000 feet, from the sea level to 1000 feet altitude in one case, and 

 from 9000 to 10,000 feet in the other. There remains to be stated 

 the important fact that the former climb was accomplished in 30 

 minutes, whilst 45 minutes was necessary for the latter. In my case 

 as in Roberts' the rate at Carlingford was half as fast again as at 

 Col d'Olen. 



Now let me consider an instance of climbs at different altitudes 

 which occupied the same time in each case. This consists of a com- 

 parison between an ascent made by me at Carlingford and one made 

 at Col d'Olen at the same speed. The result in this case is clear : whilst 

 a very obvious degree of meionexy was produced at Col d'Olen that 

 at Carlingford is scarcely to be appreciated by these methods. The 

 following are the data as regards K : 



Values of K* (Barcroft). 



The slow ascents are perhaps more instructive than the rapid 

 ones, for if the climbing be a little slower than that of the last experi- 

 ment which I have mentioned, the degree of meionexy produced at 



* For hydrogen ion values see Appendix III. 



