COMPLEX NEURAL ARCS. 83 



shown by the first irregularity in the line. The number of dashes from 

 the beginning to the break gives the latent time of the reaction in hun- 

 dredths of a second. The figure is arranged to read from left to right. 

 The left of the figure really corresponds to the bottom of the photo- 

 graphic record. 



FIG. 12. Eye-reaction records. 

 RESULTS. 



The data for the eye-reactions are presented in table 7. The left- and 

 right-hand divisions of the page contain the data for normal and alcohol 

 experiments, respectively. In each half the first column gives the 

 subject, date, and number of the experimental period. The second 

 column contains the average latent times for each period of the experi- 

 mental session and the general average of the session. The mean varia- 

 tion of each period and the average mean variation of the session are 

 given in the next column. In the column headed Differences are entered 

 at the left the differences between the first and each succeeding period, 

 according to the formula, Z) = l-2, 1-3, 1-4, etc. Similarly, the 

 Differences between the mean variations of the succeeding periods 

 are entered at the right. 



