PROGRESS IN EXPERIMENTAL PSYCHOLOGY 



the rate of nervous impulsion along the nerve tract to 

 be measurable, it was no\v sought to measure also the 

 time required for the central nervous mechanism to per- 

 form its work of receiving a message and sending out a 



GUSTAV THEODOR FECHNER 



response. This was coming down to the very threshold 

 of mind. The attempt was first made by Professor 

 Bonders, in 1861, but definitive results were only ob- 

 tained after many years of experiment on the part of a 

 host of observers. The chief of these, and the man who 

 has stood in the forefront of the new movement, and 



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