MICROSCOPIC OBJECTS. 



169 



long", fits into a case (about the size of a snuff-box) one 

 inch and three quarters wide by one inch deep. The 

 four magnifiers pack between the stage and the mirror, 



and do not occupy any extra space. If it were desirable, 

 additional magnifiers might be added for viewing test- 

 objects ; a finer adjustment might also be applied, and 

 Dr. Goring's illuminator or stops. A useful appendage 

 is a large condenser placed before the reflector." 



Since the above description was published in the 

 ' Microscopic Cabinet,' achromatic lenses have become 

 more plentiful and less costly. In aU cases, therefore, 

 where the sum of five or six pounds can be devoted to 



