EVOLUTION OF THE 'LENTICULAR MICROSCOPE'
MAKER: MORITZ PILLISCHER
c. 1850'S
In the first form, there was no mirror or wheel of apertures. A bow spring kept the slide up against one side. On the right side the stage curved outward and the left side a cutout was provided to make it easier to manipulate the slide:
The second form; a bow spring still kept the slide up against one side and a substage mirror was added:
The third form simply added a wheel of three apertures(H) on the bottom of the stage to regulate the diameter of the cone of illumination:
The fourth form added horizontal bar over one of the long edges(AB) to which was attached a bow spring to keep the slide down against the stage:
In the fifth and final form, cutouts appear on both sides of the stage, and the serial number was moved to the top of the arm:
