202 



PHOTOMICROGRAPHY 



by Reichert is shown at Fig. 67. The piece of metal is laid 

 with its prepared surface downwards, over an aperture 

 in the stage, beneath which is an inverted objective. A 

 prism illuminator is placed in the tube below the objective, 

 and the image-forming rays are reflected by means of a 



Fig. 67 



METALLOGRAPIIIC APPARATUS WITH INVERTED MICROSCOPE 



second prism, also situated beneath the objective, along 

 the tube into the camera. The second prism can be 

 rotated through 90 to form an image in an observation 

 tube if desired. 



The camera attached is also of interest as the ground 

 glass is at the side, the most convenient place for focussing, 

 the image being thrown on to it by means of a hinged 

 mirror. 



