LIST OF ILLUSTRATIONS 



Field of potatoes on Mt. Sopris Farm at Carbondale, 



Colo Frontispiece 



James Wilson, Secretary of Agriculture . . ^ Preceding 



Luther Burbank > Dedication 



W. C. Brown, President N. Y. Central Lines ) Page 



FACING PAGE 



Map showing production of potatoes in the world . 4 

 Graphic map showing production of potatoes in the 



United States 5 



Dr. J. H. Kellogg 8 



Battle Creek Sanitarium, Battle Creek, Mich. . . 8 



Some potatoes before paring 9 



After paring 9 



Chart showing origm of potato varieties ... 38 



A Burbank potato 39 



Standard early varieties 40 



Standard late varieties 41 



Two views of Iron Age cultivator at work ... 96 



Potato field at Mt. Sopris Farm 97 



Iron Age potato hoe or ridger 120 



" " riding cultivator 120 



" " potato digger 120 



'* " traction sprayer ...... 120 



" " (Improved Robbins) potato planter . . 121 



Seed pieces in place of furrows 121 



Dowden potato digger 121 



Deere disk harrow 122 



" cultivator 122 



" potato digger 122 



*' two-way plow 122 



" double-action disk harrow 122 



" shaker potato digger 122 



