58 THE SIGNS OF LIFE [LECT. in. 



" I conclude from this and similar experiments 



" i. That a crystalline lens of suitable size is a good object 

 upon which to study the nature of blaze-currents. 



" 2. That a ' blaze-current ' is a physical sign of the ' living ' 

 state. 



" 3. That a blaze-current may be post-kathodic as well as 

 post-anodic, antidrome as well as homodrome. 



" 4. That the normal direction of blaze-currents in the crystal- 

 line lens is negative or ingoing, i.e., from the external or anterior 

 to the internal or posterior pole." 



REFERENCES 



WALLER." On the Retinal Currents of the Frog's Eye, excited by Light 



and excited Electrically," Proc. Roy. Soc., Ixvi., p. 327 ; Phil. Trans. 



Roy. Soc., B vol. 193, p. 123. 

 WALLER. "The Eyeball as an Electrical Organ," Proc. Physiol. Soc., 



loth November 1900. 

 WALLER. "On the 'Blaze-currents' of the Frog's Eyeball," Proc. Roy. 



Soc., Ixvii., p. 440 ; Phil. Trans. Roy. Soc., B vol. 194, p. 183. 

 WALLER. "Le Dernier Sigrie de Vie," Comptes Rendus de P Academic des 



Sciences, 3rd September 1900. 

 WALLER." On the Blaze-currents of the Crystalline Lens," Proc. Physiol. 



Soc., November 1902 ; Proc. Roy. Soc., 4th December 1902 ; Engel- 



manris Archiv f. Physiologie. 

 DURIG. "A contribution to the action of Blaze-currents," Proc. Roy. Soc., 



4th December 1902. 



