16 Director's Annual Report. 
the trays are perforated to permit the free circulation of gas in 
fumigation; each tray has a folding handle with label holder, and 
on the outside doors are similar but larger holders for the case 
number and contents (see labels in actual size above). The 
weight of the empty cases without specimens but with the full 
3. RACK FOR STEEL STORAGE CASES. 
content of trays is, single unit, 14 trays, 170 pounds; double unit, 
28 trays, 210 pounds. To house the kapa specimens and such 
mounted bird specimens as should be kept in the dark, light 
shelves of redwood are found satisfactory. The insect cases are 
all of the double type, of the same exterior size, but the trays do 
not have perforations but interior rims covered with an upper 
surface of felt on which the glass cover rests. 
[132] 
