THE PROCESS OF EXCITATION 



103 



Fig. 11. 



Arrangement for asphyxiating the nerve. A Gasometer containing pure nitrogen. B and Bi Vessels for 

 washing the gas. C Ether chamber for eventual experiments with narcosis. D, Di and E Glass 

 faucets. F Moist chamber. G Asphyxiation chamber. H and Hi Two pairs of electrodes over 

 which the nerve is laid. I Nerve muscle preparation. 



nerve recovers almost instantaneously. Within the space of a 

 minute its irritability has risen again to its full height and the 

 same experiment, with the same result, can be repeated. Finally, 

 as Fillie 1 has shown, the like result is obtained when the nerve is 

 asphyxiated in a fluid medium. 



All these facts, the number of which indeed could be increased 

 greatly for other aerobic forms, suffice to establish the fundamen- 



1 H. Fillie: "Studien iiber die Erstickung des Nerven in Flxisigkeiten." Zeit- 

 schrift f. allgemeine Physiologic, Bd. VIII, 1908. 



