Jan., 1916] 



Plant Disease Exhibit Cases 



107 



Fig. 2 illustrates a frame of similar construction, but 

 designed for displaying photographs. The trays is only one- 

 half inch deep. A quarter-inch, quarter-round molding is 

 used to hold the celluloid and cardboard mounting in place. 

 The crosspieces are likewise quarter-inch, quarter-round strips. 

 The celluloid protects the photographs, and may be wiped off 

 with a damp cloth without injury to itself or photographs. 



Fig. 2. Exhibit case showing arrangement for photographs. 

 (Photo by L. E. Melchers.) 



Preparation of Material for Exhibit Case. 



Various types of plant disease material may be placed in a 

 case of this design. Most of the specimens shown in the 

 accompanying illustration were dried and pressed. These were 

 glued on, and fastened by means of tape to three-ply white 

 cardboard, of the proper dimensions, in the ordinary manner. 

 Where bulky specimens, such as raspberry canes, Kafir heads^ 

 etc., were used, fine wire was employed. 



