MOUNTING OBJECTS IN THE DRY WAY. 



315 



Fig. 210. 



seen five cuts made in it 

 with a saw, which do 

 not quite go through the 

 wood; between these two 

 slices the thin glasses con- 

 taining the object are 

 placed, and the two pieces 

 of wood are firmly fast- 

 ened together by four 

 very short brass screws, 

 the saw cuttings allow- 

 ing the two opposed sur- 

 faces of the wood to be 

 brought into close apposition at the ends; a section of an 

 object BO mounted is represented by fig. 212, in which a b 



Ficr. 211. 



yy 



Fig. 212. 



exhibits the pieces of wood, c the squares of thin glass 

 having the object between them, and f f the saw cuts 

 which allow the ends of the wood to be brought into close 

 approximation by the screws. The other plan of mounting 

 is shown in fig. 213; g h represents a wooden slide similar 



Fis. 213. 



to that shown by fig. 210, having a hole about half-an-inch in 

 diameter cut out of the middle ; the upper surface of this hole 

 is flat, but the under surface is very much bevelled away at 

 e e ; upon the flat surface the two plates of thin glass, with 

 the object between them, are laid, these are kept in proper 

 position by a layer of paper, i i, which covers the whole of the 

 upper surface of the wood, and as much of the thin glass as 

 may be required. Mr. Gillett has improved upon the first 

 plan of mounting, by introducing between the two plates of 



