The metabolism of the blood itself 133 



chapters in this book it will appear that in other respects I was also 

 unchanged in fact the altitude had not as yet touched me. At 

 Col d'Olen even, changes such as diminution of alveolar CO 2 pressure 

 are, in some individuals, very slight. This consideration will explain 

 why Douglas got negative results at Las Canadas, and why Cohnheim 

 and possibly Morawitz also got negative results at Col d'Olen, whilst 

 Zuntz, Haldane and others obtained positive results at higher altitudes. 

 It may of course be that in a longer time there would be well- 

 marked positive results at lower altitudes. 



REFERENCES 



(1) Warburg, Hoppe Seller's Zeitsch. LXVI, p. 305, 1910 ; Ibid. LXXVI, p. 331, 1912. 



(2) Morawitz, Archie f. exp. Pathol. und Pharmacol. LX, p. 298. 



(3) Itami and Morawitz, Deutsch. Arch.f. klin. Med. c, p. 191. 



(4) Moore and Wilson, Biochem. Journal, i, p. 326 ; Mathison, this book, chap. v. 



(5) Morawitz and Masing, Deutsche Med. Wochenschr. 1910, Nr. 8 ; Deutsche 



Archie f. klin. Med. 



(6) Haldane and Lorrain Smith, Journal of Physiol. xxv, p. 331, 1900. 



(7) Plesch, Miinchener Med. Wochenschr. LVII, 8, p. 406. 



(8) Douglas, Journal of Physiol. XL, p. 472, 1910. 



(9) Cohnheim, Kreglinger, Tolber and Weber, Zeitsch. f. Physiol. Chem. LXXVIII, 



p. 70, 1912. 



(10) Douglas, Phil. Trans, of Roy. Soc. Ser. B, Vol. 203. 



(11) Richai-ds, Supplement to Report of Pikes Peak Expedition. Phil. Trans, of 



Roy. Soc. Ser. B, Vol. 203. 





