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The Ohio Jounial of Science [Vol. XVI, No. 3, 



In order to meet the above requirements, the writer 

 attempted to construct a case which is not expensive, yet 

 attractive and well designed to display plant diseases to the 

 best advantage. 



A working plan of this case is shown on Fig. 3. The outside 

 measurements of the case are 24" x 40," the inside measurements. 

 being 223/2" ^ 383^". The sizes of the two kinds of partitions 



Fig. 1. Exhibit case showing specimens of two sizes. 

 (Photo by L. E. Melchers.) 



are 9}4" x 11" for the smaller, and 11" x 19" for the larger. 

 The arrangement of the partitions may be changed to meet 

 the requirements. Besides the arrangement as illustrated, 

 either eight compartments 93^2" ^ H". or four 19" x 11", may be 

 made. The 19" x 11" size is best adapted for such specimens as 

 cereals, weeds, etc., while the smaller are sufficiently adequate 

 for the majority of pathological specimens, such as cankers,, 

 leaf-spot diseases, etc. See Fig. 1. 



