i()i(; 



Journal of Applied Microscopy 



seen. As is well known, an examination of both dorsal and ventral sides of a 



butterfly is frequently necessary and is always desirable. 



With this thought in 

 mind, the writer has at- 

 tempted to contrive a case 

 which shall meet all the 

 requirements. It con- 

 sists of a flat box about 

 one inch deep whose 

 edges are composed of 

 wood, and whose sides 

 are plates of glass. Be- 

 tween these plates of 

 glass the insect is sup- 

 ported by means of a pin 

 attached to one glass by 

 a bit of sealing wax. 

 Figs. 1 and '2 are pho- 

 tographs of the dorsal 

 A detailed description is as 



Fig. 1. Dorsal View. 



and ventral views of a specimen in such a case 

 follows : 



Figure o represents a diagram atic section through the case and through the 

 insect (i). The frame (fif) is composed of wood rabbeted to receive the two 

 glasses (gg). These glasses are fastened in place permanently by putty (a). 

 The pin (p) which supports the insect is passed through a small piece of cork 

 (c) before it is inserted into the insect. This cork is attached to the glass by a 

 very small (|uantity of sealing wax and thus forms a larger base for support. A 

 much better arrangement would be to have a large flat head on the pin, in which 

 case the cork could be dispensed with. 



Figure 4-A represents a partial cross section of the case when pressboard or 

 heavy cardboard (cb) is 

 used for the framework. 

 The pieces of glass (gg) 

 are fastened by pasting 

 paper (p) over as at (f). 

 The paper is represented 

 as still unfolded (pi). 

 Fig. 4, B and C represent 

 a cross section and longi- 

 tudinal view of the press- 

 board framework and 

 binding paper. The 

 pressboard is cut on the 

 dotted lines so as to readily 

 fold to form the corners. 

 The distance between the Fig. 2.— Ventral View, 



