O'SHEA — ASPECTS OF MENTAL ECONOMY. 



167 



3* 



6A 3P 2>" 3 A <SA 3r Sr 3* SP SP t>P 3A 9A 3f» 3>» 



Fig. 14. — The ordinates show the relative intensities of sound required for dis- 

 crimination. The abscissae show the progress of the hour as explained above 

 < Patrick.) 



. 9 o 3A 



180 



3P 3A 3A 3P 3P 3A 9/K 3P 9P 3A 9A 3P 3P ^PM 



Fig. 15. — The ordinates show the number of letters named in one minute. The 

 abscissae show the progress of the hours as explained above. (Patrick.) 



