X ILLUSTRATIONS. 



PAGE. 



Fig. 36. Sample eye-reaction records, unretouched, reproduced full size from contact 



prints from the original plates 164 



37. "The Taylor Numbers" 168 



38. The movement pattern which should be followed by the hand in pointing out 



the numbers in order 169 



39. Arrangement of apparatus for the measurement of visual efficiency 170 



40. Visual efficiency with different diameters of artificial pupil 170 



41. General arrangement for shifting the visual-acuity object into the position 



commonly occupied by the falling plate camera 172 



42. Details of the visual-test object, its mounting and means of illumination 172 



43. Schematic diagram of circuit for measuring the electrical threshold 178 



44. Diagram of the automatic pendulum key used to regulate the length of the 



electric shocks employed as stimuh 179 



45. Detail for one of the contact devices struck open by the pendulum 180 



46. Arrangement for noiselessly catching the pendulum at the end of its swing . . 181 



47. Slow-motion control for changing the separation between the switches opened 



by the pendulum 181 



48. The non-polarizable electrodes for the finger tips, with means of controlling 



the temperature 182 



49. Apparatus for controlling the voltage of the shocks and for intermittently 



short-circuiting them 182 



50. Ground plan of the apparatus and arrangement for photographing eye 



movements 185 



51. Full-size reproduction of a portion of the visual-test object window 186 



52. Sample eye-movement records, unretouched, reproduced nearly full size from 



contact prints from the original plates 186 



53. Schematic representation of apparatus and hand in position for recording finger 



movements 187 



54. The form of the right-angle maze 188 



55. The maze-tracing apparatus 189 



56. "Wells' Clerical Test C" 191 



57. Body-weight curve of Bro 210 



58. Body-weight curve of Can 212 



59. Body-weight curve of Kon 213 



60. Body-weight curve of Gar 214 



61. Body-weight curve of Gul 215 



62. Body-weight curve of Mon 216 



63. Body-weight curve of Moy 217 



64. Body-weight curve of Pea 218 



65. Body-weight curve of Pec 219 



66. Body-weight curve of Spe 220 



67. Body-weight curve of Tom 221 



68. Body-weight curve of Vea 222 



69. Body-weight curves of Fis, Ham, and Sne 225 



70. Body-weight curves of How, Van, and Lon 226 



71. Body-weight curves of Har and Wil 226 



72. Body-weight curves of Tho and Liv 226 



73. Body-weight curves of Sch and Kim 227 



74. Photograph of Can, September 29, 1917 240 



75. Photograph of Can, February 2, 1918 240 



76. Photograph of Mon 240 



77. Photograph of Kon 240 



78. Photograph of Gar 240 



79. Photograph oi Gul 240 



80. Photograph of Bro 240 



81. Photograph of Moy 240 



82. Photograph of Pea 240 



83. Photograph of Pec 240 



84. Photograph of Tom 240 



