Compound microscope

The eyepiece is screwed into the top of this microscope's tube, while the lens is at the bottom. It is held in place at the top of the arm with a rack mechanism on the back. This is controlled by 2 side screws that move it vertically for macroscopic focusing. The arm is slightly concave and has a screw marked 0 to 9 for fine focusing.

The stage is square with a central hole. It has a screwless mechanical system on the top consisting of 2 clips to hold the sample, between which is a rectangular element marked 0 to 50. This is attached to the center of the arm right below the joint system. The underside has a condenser, which can move vertically using a rack mechanism that is controlled with a side screw on the left-hand side.

This model has an iris-style diaphragm system. The plano-concave mirror is located at the bottom of the optical axis on an articulated element allowing it to move from side to side. The microscope base has 3 legs, all sloping away from the central axis and each with its own circular foot. The back leg bears the manufacturer's inscription: "W. Watson & Son. 313 High Holborn. London." At the bottom is the piece's serial number: "5364."