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 origin 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 Bobbins) 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 



