226 



Pub. Puget Sound Biol Sto. 



Vol. 2, No. 47 



PLATE 39 



A portion of the trays shown in plate 38 and the bins for storing tlie moss; 

 also the chute for carrying the moss to the ground floor. 



that the air has no special channels for passage but is distributed equally 

 through the moss. The rate of drying depends upon the amount of cir- 

 culation. A large and strong inflow of slightly warmed air (about 90° F.) 

 will produce fairly rapid drying. The value of this method lies in the 

 forced circulation through the moss. 



