CHAPTER XI 



INORGANIC RESPONSE MODIFIED APPARATUS TO EXHIBIT 

 RESPONSE IN METALS 



Conditions of obtaining quantitative measurements Modification of the 

 block method Vibration cell Application of stimulus Graduation .of 

 the intensity of stimulus Considerations showing that electric response 

 is due to molecular disturbance Test experiment Molecular voltaic 

 cell. 



WE have already seen that metals respond to sti- 

 mulus by E.M. variation, just as do animal and 

 vegetable tissues. We have yet to see whether the 

 similarity extends to this point only, or goes still 

 further, whether the response-curves of living and in 

 organic are alike, and whether the inorganic response- 

 curve is modified, as living response was found to be, 

 by the influence of external agencies. If so, are the 

 modifications similar ? What are the effects of super- 

 position of stimuli ? Is there fatigue ? If there be, in 

 what way does it affect the curves P And lastly, is the 

 response of metals exalted or depressed by the action 

 of chemical reagents ? 



Conditions of obtaining quantitative measurements. 

 In order to carry out these investigations, it is necessary 

 to remove all sources of uncertainty, and obtain quanti- 

 tative measurements. Many difficulties at first presented 

 themselves in the course of this attempt, but they were 



