257 



A small glass tube (Fig. 9) is pasted to a narrow glass plate having 

 the exact dimensions of a cylindrical glass jar. The animal in ques- 

 tion is put into the tube and the glass plate is placed into the jar and 

 the latter filled with alcohol. The jar is now closed by a glass stopper. 



Such cylindrical vessels are sold by Warmbrunn, Quilitz 

 & Co., manufacturers of glass , Berlin, Germany, C, Rosenthaler- 

 straße 40. 



In such cases in which we have to deal with animals of very mi- 

 nute size, it may be well to bring them into a thin glass tube of pro- 

 portionate size (Fig. 1 0) . Both ends of the tube drawn out by a low 



i'ik'. II. 



Fig 9. 



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blowpipe flame are broken off" so as to measure just a few millimeters. 

 In order to attach the tube prepared is this manner to a narrow glass 

 plate, we paste a small and narrow strip of parchment paper over either 

 end of the tube. But we can also use fine sheats of gelatin , cut ofi" a 

 tiny strip of this substance and place it in damp condition across 

 either end of the tube. After some minutes the gelatin solidifies and 

 the glass plate carrying the tube can be placed into a cylindrical jar. 

 As the ends of the tube are open, the alcohol is forced to penetrate 

 the interior of the tube and fills the latter completely. 



4) Animals of a middle size are usually pasted to a glass plate. In 

 specimens of great value, however, this method is ineligible, be- 

 cause the animals thus arranged might become injured and unfit to 

 serve the cause of instruction. In order to avoid this risk I prepared 

 by means of the blowpipe small arches (Fig. 12) from a glass rod of 



