CH. VII] PROJECTION OF IMAGES OF OPAQUE OBJECTS 185 



FIG. 1 02. UNIVERSAL PROJECTOSCOPK. 

 (Cut loaned by C. II. Stoelting Company). 



This instrument as shown in the picture is designed to project: 



(1) Lantern slides and other transparencies in the usual vertical position 

 or in a horizontal position. 



(2) Opaque objects. 



(3) Microscopic objects. For this the lantern-slide objective is turned 

 back and the microscope turned up in place. 



