158 VITALITY AND EFFICIENCY WITH RESTRICTED DIET. 



the left, the fall (1) in the line is caused by the stimulation of the ten- 

 don; the second drop {2) is from the reflex thickening of the muscle. 

 The distance from the beginning of 1 to the beginning of 2 is the latency 

 for the reflex, which is measured in thousandths of a second (the kymo- 

 graph speed was 100 mm. per second). The amplitude is the vertical 



Fig. 29. — A portion of a sample record for the evening measurements in room B. 



The curves above the cross, which is in the left of the figure, are from the patellar reflex and show 

 a gradual shortening of the interval between stimuli until the reflex for the second stimulus ia 

 absent. The wavy and more or less irregular lines in the lower portion of the figure are from 

 the finger movements. The black dots were caused by the jump sparks and indicate the 2- 

 second intervals. The horizontal broken lines in the lower section are the word-reactionrecords. 



