ILLUSTRATIONS. 



PAGE. 



Frontispiece. General view of the psychological laboratory of the Nutrition 



Laboratory. 



FIG. 1. General plan of psychological laboratory and apparatus 31 



2. Main apparatus table in psychological laboratory (first view) 32 



3. Main apparatus table in psychological laboratory (second view) 32 



4. Apparatus for stimulating the patellar reflex 38 



5. A typical record of the patellar reflex 43 



6. The noise-stimulus apparatus for the lid-reflex in position before the photo- 



graphic recording camera 59 



7. Time-recording interruptor at rest 60 



8. Interruptor in action 60 



9. Protective lid-reflex record 60 



10. Falling-plate recording-camera 80 



11. Falling-plate recording-camera (inner construction) 80 



12. Eye-reaction records 83 



13. Diagram of pendulum-stop exposure apparatus 94 



14. Diagram of apparatus for Faradic threshold, word-reaction, lid-reflex, and 



eye-movement 95 



15. Record showing latency of the pendulum-stop exposure apparatus 96 



16. Voice-reaction key 99 



17 to 20. Records of the latency of the voice key 100 



21. Photograph of a subject in position for the association experiments 101 



22. Typical record of a word-reaction experiment 101 



23. Curves of the association-reaction time 115 



24. Curves of the frequency of the association categories 118 



25. Curves of the usualness of the association 122 



26. Diagram of the connections for memory experiment 129 



27. Typical eye-movement record 154 



28. Typical records of the finger-oscillations and pulse of two subjects 171 



29. Reproduction of a temporal-pulse record as made by the Dodge telephone- 



recorder in series with the string galvanometer 171 



30. Part of an association experiment record 195 



31. Association pulse of Subject VII 201 



32. Variations of the normal subjects from the average of the group for various 



measurements 264 



5 



