ANIMAL ELKCTRICITV. LECTURE II. 



43 



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Fig. 13 (2466). — Effect of " soda water " upon the electrical responses of 

 isolated nerve. 



The vertical dark bar indicates when the "soda water" acts on the nerve. 



The deflections at beginning and end of the series are standard deflections 

 by ToW volt. 



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Fig. 14 (2464). — Effect of alcohol vapour (ethylic alcohol, EtOH). 



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Fig. 15 (2468). — Effect of tobacco smoke on the same nerve (2464) twelve 

 hours later. 



