362 



ERECT IMAGES IN DRAWINGS 



[Cn. X 



2 . The slide is then placed on the stage of the projection appara- 

 tus and its image thrown on the drawing surface. In case the 

 specimen is wrongly placed to give an erect image the letters will 

 show it, and the specimen can be rearranged until the images of the 

 letters are correct in every way, then of course the images of the 

 microscopic specimens will be erect in every way (see also 517). 



513. Erect images with opaque objects in a photographic 

 camera with translucent screen. Place the object upside down in 

 the holder. On the translucent screen it will be erect (fig. 211). 

 If the object cannot be put upside down, the image will appear 

 wrong side up on the translucent screen (fig. 212). It can be drawn 



FIG. 203. LARGE EDINGER APPARATUS IN A HORIZONTAL POSITION FOR 



PROJECTION ON A VERTICAL SCREEN. 



(Cut loaned by Ernst Leitz). 



