No. 51 034. 



Apparatus for Projecting Horizontal Objects. 



181 



.."- 



a 



OS 



a 







0> 



C5 



X 



a 



- 



e 



.3 

 O 



X 



- 



51030 t-t 51031. 1:30. 



Auxiliary Apparatus for Projection Purposes. 



51.032. Apparatus for Projecting Horizontal Objects, Figure, with 2 condenser lens.-. 

 1 22 mm diameter, 1 projection objective, 55 mm diameter, and 1 erecting mirror silvered 



on the back 4. 5. 



51.033. --The preceding, with erecting mirror silvered on the front 5. 0. 



By using an erecting mirror silvered on the front "ghosts" are obviated and greater sharpness 

 of image is secured. 



51.034. --The preceding, but with Glass Prism of 70 mm side and height 

 instead of the upper mirror 5.10. 



By employing a reflecting prism in lieu of the upper mirror "ghost" images are avoided and 

 great sharpness 'of image is secured. The prism is shown in Fig. 51,038. When using the apparatus 

 in conjunction with lanterns having condenser lenses 102 or 122 mm diameter, the front condenser 

 lens should be removed; the entire condenser being taken away when the apparatus is employed with 

 lanterns having 152 mm condenser leu- 



Cl. 2S1. 



