ROSS 5235 LONDON
PATENT
No 1 PATENT BINOCULAR MICROSCOPE
top-hateyepiece. The microscope is place in a horizontal position. As the observer looks down(see illustration below)a prism allows the observer to see the image of the object being studied while it is superimposed on the paper below so the object may be drawn as a tracing. The glass
framesare neutral density filters to regulate the brightness of the drawing paper so the superimposed drawing is not so bright as to outshine the object projected from the microscope to the eye. An article about camera lucidas is on this site.