HOW WE ROB THE SOIL. 
97 
in a particular pattern, and that after a time you 
found your red beads nearly done. By then starting 
another pattern, 'which did not use up the red beads 
so fast, you might go on with your amusement much 
longer than if you kept to the first pattern. 
Wind-borne Seeds. 
1, Bignonia ; 2, Senecio ; 3, Dandelion ; 4, Yam ; 5, Cinchona.. 
8. Now all plants do not take the same share of 
the various plant-foods. For instance, corn may 
take from the land a large share of one kind of food, 
and peas much of another kind. 
9. So when a crop has made the land poor in any 
( M 387 ) Gr 
