Browse Items (3472 total)

One of 2 Oblong Mullard light bulbs, very fine filament wire in twisting pattern and 4 pins for power connection.

Lined box containing slits and pinholes for optical bench work.

a cylindrical glass laboratory jar with rimmed top and base.

Metal lamp on an adjustable stand with perpendicular collimator. In oak box. Whole system can be moved in the x, y and z direction. 3 turning handles all with scales 0 to 25 in unit increments, labelled every 5.

An Ediswan pointolite resistance box with power cables still attached.

Large oblong carbon filament bulb wit screw fitting in brass fitting with wires still attached. Engraved on side of bulb and hand written on glass inside bulb is the number.

For currents of: 0.03, 0.06, 0.09, 0.15, 0.3, 0.6, 1.5 (x2), 3, 6 (x2), 15, 30 amps

Fearns Circular Slide Rule, in a plastic case marked, "CIRCULAR SLIDE RULE", consists of a main dial, a transparent top dial and a moveable cursor to facilitate reading the scales. Also has manual in case.

Brass microscope on wooden stand with adjustable mirror, sliding slide holder and blank brass plate.

Brass telescope with attached brass tripod, 2 steadying rods and 3 fold away tripod feet. Fold away into original box. Comes with 1 terrestrial and 3 astronomical eyelenses, brass lens cap and brass extending tube.