676 UTILIZATION OF THE FRUITS OF FOREST TREES. 



Only a very inconsiderable portion of the seed, however, ever 

 reaches these lowest trays ; most of it remains on the upper 

 trays, which are not shaken or disturbed in any way, until 



Fig. 362. Section of seed-kiln. 



they are removed. When once the cones are opened, the trays 

 on which they lie are removed, and the cones shaken on to a 



Fiir. iW3. Ground-plan of lain. 



floor of wire-grating immediately above the revolving hollow 

 sieve (b). The cones are raked up and down over this floor 

 BO that all the seed may be removed. The vapour from 

 the cones escapes by means of shafts (d, d), which can be 



