THE FOREST NURSERY 289 



the margin of the seedbed. The beds are well rounded and the 

 paths depressed 2 or 3 inches below their margin. Two covers fit 

 over the framework: the first is made of f-inch mesh wire netting, 

 and the second of laths spaced to produce half shade. As soon 

 as the seed is sown both of these covers are placed in order over 

 the beds and loose laths are adjusted in the open spaces in the 

 second cover. The sides and ends of the framework are closed by 

 tacking building paper or other light material over them (Fig. 67). 



Photograph by U. S. Forest Service 



FIG. 67. Standard seedbed boxes completely enclosed during the 

 period of germination. 



The seedbeds are thus entirely closed and remain in this condition 

 during the period of germination. By raising the second cover 

 from time to time the progress of germination can be observed 

 and water supplied by sprinkling, if necessary. The complete 

 seedbed box, including the framework and the two covers, costs 

 from $2.50 to $5 for materials and labor, depending upon the 

 locality and the number made. If properly taken care of when 

 not in use, they will last from 5 to 8 years if chestnut or other 

 durable wood is used in their construction. 



