TEN CORN VARIATIONS 



The smallest figure, at the lower left, 

 shows the grain of an improved teosinte, 

 the primitive type of corn. It has no 

 rachis or cob, the kernels shelling out 

 like wheat. The other figures show a 

 few gradations from this primitive to 

 field corn, as developed through selec- 

 tion. We may suppose that the corn 

 passed through some such stages as 

 these in the course of its long evolution- 

 ary development. 



