ILLUSTRATIONS. XI 



PAGE. 



Fig. 85. Photograph of Vea 240 



86. The diet squad (A) on November 25, 1917 242 



87. Temperature, pulse, and respiration charts of Wesley G. Spencer (Spe) . . 363 



88. Electrocardiograms for Pea and Kon 394 



89. Electrocardiograms for Pec and Bro 394 



90. Electrocardiograms for Kon and Pec 394 



91. Pulse-rate curves for sitting and lying positions and at different times of 



day. Squad A 411 



92. Changes in the pulse-cycle duration with exertion, Kirk G. Montague... . 417 



93. Composite curves for changes in pulse-cycle duration with exertion, Squad 



A, compared with the results for normal series of 1917 422 



94. Composite curves for changes in pulse-cycle duration with exertion, Squad 



B, compared with the results for normal series of 1917 423 



95-101. Curves showing changes in the duration of the pulse cycles at the 



transition from standing to walking and the reverse 426-436 



102. Errors in accuracy of tracing between parallel hues 561 



103. Percentage of correct judgments in discriminating the pitch of tones 566 



104. Efficiency in the cancellation of specified number-groups 572 



105. Average results in the 10-minute addition test 576 



106. Average scores for memory span 581 



107. Averages for strength of grip at evening sessions and with six members 



of Squad A on one date following the low-diet experiment 588 



108. Averages for strength of grip at morning sessions 589 



109. Variability in the average strength of grip at evening sessions 590 



110. Variability in the average strength of grip at morning sessions 591 



111. Patellar reflex averages 596 



112. Eye-reaction time and its variabihty 601 



113. Word-reaction time and its variability 605 



114. Average discriminatory reaction time for finding and pointing to serial 



numbers 606 



115. Visual efficiency and its mean variation 610 



116. Electrical threshold averages and variability 615 



117. Speed of the eye movements 620 



118. Variability in the speed of the eye movements 621 



119. Number of finger movements performed in 10 seconds at evening sessions 624 



120. Number of finger movements performed in 10 seconds at morning sessions 625 



121. Number of finger movements performed in successive 2-second intervals . 627 



122. Average time required to complete the maze-tracing task 631 



123. Accuracy in performing the clerical tasks 636 



124. Chart showing the average values for metabolism and physiological meas- 



urements of nine members of Squad A 702 



