land visitors. Individual observations and the 

 special investigations of scientific men show 

 that altitude has been a large, unconscious 

 source of nature-faking. During the summer 

 of 191 1 a number of English and American 

 scientists, the "Anglo-American Expedition," 

 spent five weeks on Pike's Peak, making spe- 

 cial studies of the effects of altitude. Their in- 

 vestigations explode the theory that altitude 

 is a strain upon the heart, or injurious to the 

 system. These men concluded that the heart is 

 subjected to no greater strain in high altitudes 

 than at sea-level, except under the strain of 

 physical exertion. The blood is richer in high 

 altitudes. For every hundred red corpuscles 

 found at sea-level there are in Colorado Springs, 

 at six thousand feet, one hundred and ten ; and 

 on the summit of Pike's Peak, from one hundred 

 and forty to one hundred and fifty-four. 



"The danger to people suffering from heart 

 trouble coming into high altitudes is grossly ex- 

 aggerated," says Dr. Edward C. Schneider, one 

 of the Anglo-American expedition. "The rate 

 of circulation is not materially increased. The 



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