A set of disks with a disk revolver for mounting opaque objects, c.1865
The set is supplied with
72 numbered disks that are stored on three brass racks.
The brass plate A of the opaque disk revolver
rests on the microscope stage. The specimen can be
cemented to disk G which is placed in holder
E. The arm C can pivot about point
B. Turning the milled knob F results
in rotation of the disk holder E via a fusee
chain mechanism.The entire mechanism can swivel within
drum D thus allowing the specimen to be viewed
with any orientation.