Solar Microscope

The object tube is a copper alloy cylinder with a copper alloy sleeve that slides over it. An external rack and pinion arrangement adjusts the position of the sleeve. The projection lens screws into the end of this sleeve. There is a slot behind the lens to take a copper alloy plate with objectives. The stage is a heavy copper alloy plate inside the object tube and held in place by an internal cylinder and a spring. The stage has a dovetail slot which carries a copper alloy plate holding a condenser lens. This assembly is mounted on a draw tube that pushes into a cylinder with an external screw thread and a condensing lens. The square copper alloy shutter plate is inscribed with the manufacturer's name, has two holes at opposite corners and a centre hole with a thread to take the body. The rectangular mirror is attached to a hinge on the rear of the plate. A grub screw turned by a wing nut in a semi-circular slot in the front of the plate alters the angle of the mirror. This assembly is mounted on a copper alloy disc set in plate which can be turned, independent of the body by a second knob on the plate.