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specimens are to be dried, the trays may be taken out and used singly or 
hung up in stacks by cords at each corner. If trays of greater depth are 
needed, one tray may be inverted over another one. Blowflies and other 
insects may be kept out by tying cheesecloth over the trays. 
Anthony (1925) describes a type of collecting chest with knock-down 
trays to be used in a regulation army locker-trunk or steamer trunk. The 
writer has used this method with some modifications in the standard fibre- 
cases used by the Geological Survey, Canada, for pack-horse work 
(Figure 2). The pack-horse case with lower part bevelled off on one side 
was found preferable to the old type of rectangular telescope case because 
it carries with specimens right side up, but any deep, narrow telescope case 
will answer the purpose. Five or six thin boards to \ inch thick, of 
soft pine, beaverboard, or compo-board, are cut so that they will easily 
drop flat in the bottom of the case. Two strips of £ inch material as long 
