ACTION OF ANTIPYRETIC ANALGESICS 329 



etc.), but none of these were found satisfactory for the purpose in 

 view. The most convenient and satisfactory method was finally 

 found to be the calculation of a mathematical problem. Two 

 sets of problems were submitted to the subjects in all experi- 

 ments. In one series the subject was requested to add 17 men- 

 tally to a two-figure number, such as those given in the following 

 table (table A) and to announce the sum as quickly as possible 

 through a telephone arrangement which breaks the circuit and 

 stops the clock. In the second series a more difficult task was 

 given to the subject. The experimenter in this case announced 

 a two-figure number and the subject was required to multiply 

 the same by 3 and add 4 to the product, and then announce the 

 result through the speaking disc, thus recording the reaction 

 time (table B). 



TABLE A TABLE B 



Exercise: Add 17 mentally Exercise: Multiply by 8 and 



and respond add 4 o,nd respond 



22 35 29 64 



71 58 76 27 

 68 41 55 46 

 46 75 48 23 



33 38 24 69 

 64 67 79 33 



51 54 54 65 

 32 28 47 22 

 59 47 58 53 



73 26 75 67 

 29 43 49 39 

 56 31 68 52 



48 66 35 61 



34 57 71 36 

 62 42 , 37 28 

 78 24 66 73 

 25 55 45 44 

 39 27 34 31 



74 79 21 25 



52 45 78 74 

 77 21 51 77 



49 63 26 43 

 44 23 72 59 



72 37 32 63 



53 61 41 56 

 76 65 38 42 

 36 64 57 62 



