INDEX 



Wheat, Red Fife, 353, 359 



seeds of, brought over by pilgrims, 

 321 



Turkey, 351 

 White, Andrew, D., 6 

 Whitehead, 6 

 "Why We Behave Like Human 



Beings," 64 

 Will-to-mastery, of Adler, 100 

 Wilson, Edmund B., 20 

 Wohler, 19 



Woods, F. A., 106, 184 

 Woodworth, R. S., 84 

 Work, factors influencing output of, 



129, 133, 160 

 Worker, accident-prone, 148, 150 



effect of monotony on, 157, 158 



factors influencing, 124, 126, 127j^. 



intelligence of, in relation to length 

 of service, 139j^. 

 Wright, Almroth, 235 

 Wundt, 61, 62, 65 

 Wyatt, 158 



X 



X-chromosome, 182 



X-ray, 200, 203, 204, 216, 237 



X-Y traits, 100, 101 



Yearbook, 1928, National Society for 



the Study of Education, 103 

 Yeast, source of vitamin B, 371 



of vitamin D, 375 



of vitamin G, 377 

 Yellow Cab G)., use of psychological 



tests by, 137 

 Yellow fever, 241, 268, 294 

 Yerkes, 66, 68 

 Yoakum, 135, 140, 141, 146 



Zoology, contributions of, toward 

 formation of intelligent mental 

 outlook, 315, 316 

 to human welfare, 293 

 economic, 304j^. 



[399] 



