WEIGHT. DEPTH OP COVERING. 271 



TABLE XIV. WEIGHT OF GRASS-SEEDS, AND DEPTH OP 

 COVERING. 



Column 5 shows the depth of soil, in inches and frac- 

 tions of an inch, at which only one-half of the seeds 

 germinated. 



Column 6 shows the least depth of soil, in inches or 

 fractions of an inch ; at which none of the seeds germ- 

 inated. 



