Compound Microscope in Case with Accessories, by Dollond, London, c. 1825-1850

The pillar is supported on a flat, folding tripod base with ball feet. A bracket holding the cylindrical limb is attached to the pillar by a compass joint. A rack and pinion raises and lowers the circular stage for coarse focusing. The stage is mechanical and the plate is moved by two milled screws. There is a pinhole and a peg to hold accessories. A sliding sleeve carries a condensing lens below the stage and a plano-concave mirror in a horseshoe mount is set at the lower end of the limb. The body tube screws into a threaded ring on an arm near the top of the limb. A mill-edged screw on the top of the limb moves the arm for fine focusing. A Huygenian eyepiece pushes into the top of the limb and a threaded collar screws into the lower end. Two button objective lenses that are held together with a bayonet fitting screw onto the collar. The fitted mahogany case also holds a copper alloy can for the containing an objective, a can with a small Lieberkühn, stage forceps, a bull's-eye lens on two articulated arms, a cylinder with two lenses small magnifier, two live boxes, a glass phial, a black and white disc, two three glass discs, two glass discs with copper alloy rims, a copper alloy mount to hold the discs or phial on the stage, a cone condenser, two ivory talc boxes, a stage, an oval key for adjusting the angle of the microscope, fishplate comprised of a wooden board and a glass plate and six ivory sliders.