PSYCHOLOGICAL MEASUREMENTS. 



595 



amplitude, and 0.17 second for separation, i. e., refractory period. These 

 values are in the same range as those mentioned for the series of 1917, 

 which were 32 cr, 15 mm., and 0.25 second. The individual subjects do 

 not show extraordinary variation among themselves or with any 

 individual from date to date. 



In the case of Squad B there were only 4 men, Fis, Har, Sne, and 

 Tho, with whom the patellar reflex was usually present in measurable 

 amplitude and whose records are reasonably complete for the series 

 of experiments. On the first date, October 6, these four show aver- 

 ages of 37 a for latency, 23 mm. for amphtude, and 0.18 second for 

 refractory period separation. All of the values, considering the process 

 under discussion, are in reasonable agreement with the previous values 

 which have been mentioned as possible standards. 



*L., A., and S. designate latency in 0.001 second (<r), amplitude in millimeters, and separation 

 in 0.01 second. In the body of the table the index figures refer to the following notes: 

 ^No reflexes. 'Summation evident. 



'No failures with short S. ; all very small. ^Second contact out of order. 



It will be more convenient to compare the results with the two squads 

 under conditions of normal eating and reduced diet from the plotted 

 values in figure 111. The solid lines are for Squad A, the broken hnes 

 for Squad B. The two curves at the top of the figure give the latency. 

 Beginning with 34 a on September 29, Squad A in their second experi- 



