yCOTCH PINE AND SPRUCE SEED. 



755 



made to fall from tray to tray down to the cooling-chambers C,C : 

 a supply of cool air is always admitted into the latter in order 



Fia. 330. 



Fig. 331. 



that their paved floor may cool the seed, which is from time to 

 time swept out of the cooling-chambers. 



3 c 2 



