618 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



left and right are, as in the case of the normal data of Dodge and Bene- 

 dict, somewhat below the values shown for the 63 men of the series of 

 1917. This may be a mere matter of chance, or on the other hand 

 partly due to the time of day of taking the records. Undoubtedly 

 sleepiness slows down the eye movements.^ The variability in the 



Table 180. — Squad A — Eye movement speed and its variability. 

 [L. and R. designate left and right movements, M. and S. D. in <r, and C. in per cent.] 



eye-movement records shown with Squad B, November 4, is slightly 

 above 8 per cent as an average for the variability figures of the indi- 

 vidual series. Individual subjects show variabilities which range from 

 4 per cent with Lon, left, to 12.7 per cent with How, left. 



^From a totally different series of experiments we have records on one subject who, when 

 the records were taken, was very sleepy and his eye movement time for 40° movements is in 

 the range of 280 to 300; he started the series of movements at the signal from the operator, 

 but the plate shows that he very soon closed his eyes and was asleep. 



