A flat metal disc, one side of which is reflective, with a rectangular grating in the middle. This is contained within a wooden box which…
A tall cylindrical glass container with an open top. The container is formed out of two tubes, one slightly smaller than the other, connected at…
A glass cup resembling a wine glass. The bulb of the glass is formed of two glass hemispheres, a smaller one inside a larger one;…
A glass tube closed at both ends. One end is closed in a smooth bulb. The other end is closed to a point. Small droplets…
A very large round-faced voltmeter is set in a wooden stand. The face has an arc shaped window behind which is visible a scale labelled…
A long rectangular metal plate attached to a large tuning fork mounted parallel to the plate. At one end of the rectangular metal plate, the…
This is a small adjustable arc lamp on a microscope-like stand. It consists of two rectangular plates of metal set next to each other; set…
A 10″ lightweight slide rule made of plastic. The body has a grooved frame and flat plastic cursor. The cursor has a single red coloured…
This object sits on a heavy metal base with a manufacturer’s label attached to one corner. There is a vertical cylinder on top of the…
This is a cylindrical gauge with a circular dial on top covered with a circular glass cover. The body of the gauge is metal, perhaps…