ILLUSTRATIONS 



PAGE 



GLACIAL MAP OF NORTH AMERICA 68 



GENERAL SURVEY SOIL MAP OF ILLINOIS 76 



A MAN OF SCIENCE: EUGENE WOLDEMAR HILGARD 102 



MAP OF UNITED STATES SOIL PROVINCES 116 



NITROGEN FIXATION BY CLOVER 218 



TOPOGRAPHIC MAP OF OHIO EXPERIMENT FIELD 252 



DIRECTOR CHARLES E. THORNE . . . 254 



SIR JOHN BENNET LAWES 342 



SIR JOSEPH HENRY GILBERT 344 



TURNIPS ON AGDELL FIELD, 1908 362 



DIRECTOR A. D. HALL 408 



DIRECTOR EDWARD B. VOORHEES > 516 



RAINFALL CHART OF NORTH PLATTE, NEBRASKA 580 



RAINFALL MAP OF THE UNITED STATES 582 



