The acquisition of oxygen by the blood in the lung 193 



the most part satisfied the teachers of the subject, but which more 

 and more failed to satisfy those who were actually at work upon it, 

 and there were not wanting signs that even in the " Landwirtschaft- 

 liche Hochschule" in Berlin some could be found who were prepared 

 to coquet with the views which emanated from Copenhagen and were 

 reflected from Oxford. 



These views were supported by each piece of experimental evidence 

 that appeared. On the one hand they rested upon a biological 

 conception which could be illustrated from many parts of the animal 

 kingdom, on the other hand they leant upon data which were derived 

 from experiments upon man, not under operation, not under anaes- 

 thetics but in whom the normal functions appeared to have scope to 

 exercise their normal activity. Finally the physical theory seemed 

 to be disproved by the pushing of its own requirements to their 

 conclusion. 



REFERENCES 



(1) Nagel's Handbuch, i, pp. 54 et seq. 



(2) Haldane and Lorrain Smith, xxn, p. 231, 1907. 



(3) Bohr, Skand. Archiv, xxn, p. 221, 1909. 



(4) Hiifner, Anncd d. Physik. u. Chem. Bd. LX, p. 141, 1897. 



(5) Zuntz and Loewy, Arch.f. Physiol. p. 166, 1904. 



B. R. F. 13 



