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with close-fitting doors and fitted inside with pigeon-hole com- 

 partments in which the genus covers are placed and are thus 

 readily accessible for reference. The name of the natural order 

 is placed above the pigeon-holes containing the sheets belonging 

 to that order, while it is sometimes convenient to affix an 

 index of the genera in each pigeon-hole on the inside of the 

 cabinet doors, or a list of the genera may be placed on the 

 top of the sheets in each compartment. 



Before examining or preparing sections of dried flowers and 

 fruits they should be placed in cold water and then gradually 

 heated until sufficiently soft 



