A SEED AND ITS GROWTH 



53 



hardier (that is, able to sprout in cooler weather) than 

 others ? Which will the gardener plant earliest in the 

 spring ? 



Do not throw away all the plants sprouted in these ex- 

 periments. Some of them will be of use in later ones. 



FIG. 32. Seedlings of corn and beans climbing to the surface from the 

 depths of one, two, three, and five inches. Which depth is best? 



A good thing to know is the proper depth at which to plant 

 seed. To begin with, let us see whether there is any advan- 

 tage in one depth over another. Take any wide-mouthed 

 bottle, and put in an inch of wet sand or loam. Then put in 

 a seed of corn close to the glass, and put in a half inch more 

 of the sand or loam. Set in another seed, touching the glass, 



