CONTENTS 
LXXVIII. Apples Have Traveled Far. 156 
LXXIX. The Maple Family . 158 
LXXX. Man Spreads Weeds . 160 
LXXXI. Cactus for Cows . 162 
LXXXII. Nature’s Idea of Cotton. 164 
LXXXIII. Tiny Plants Manufacture Fer¬ 
tilizer . 166 
LXXXIV. Where Did Corn Come From? .. 168 
LXXXV. Inventing New Fruits. 170 
LXXXVI. A Neglected Plant. 172 
LXXXVII. Sunflower Travels . 174 
LXXXVIII. Coaxing the Sugar Beet. 176 
LXXXIX. Celery Is a Built-Up Plant .... 178 
XC. Plants That Wigwag . 180 
XCI. Leaves Are Tree Ash Cans. 182 
XCII. Oaks Like to Be Different. 184 
XCIII. Tree Roots Are Water-Hunters 186 
XCIV. The Cactus Houses Woodpeckers 188 
XCV. Bananas Are Newcomers . 190 
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