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MEDIA BOXES 



vertical face of a weighted triangular block of wood, 

 sliding free on the bottom (Fig. 105, A) ; or by a flat 

 piece of wood sliding in a metal groove in the bottom 

 of the box, which can be fixed at any spot by tightening 

 the thumbscrew of a brass guide rod which transfixes 

 the partition (Fig. 105, B). The front of the box is pro- 



FIG. 105 . Medium box, showing alternative partitions A and B. 



vided with a handle and a celluloid, label for the name 

 of the contained medium. These boxes are arranged 

 upon shelves in a dark cupboard or preferably an iron 

 safe which should be rendered as nearly air-tight as 

 possible, and should have the words "media stores" 

 painted on its doors. 



