Browse Items (3473 total)

Hand blown wide oval glass jar. Base rim is added glass ring

13 masks in individual envelopes in a clear plastic box. Masks are square pieces of glass painted black with either a pin hole window or a circular band.

Hand sized brass spectroscope with small button to shut aperture. For looking through to see spectrum of sky, mainly to judge water absorption levels

Brass mounted pair of lenses fixed to a wooden block. Possibly a piece of a telescope. With leather lens cap.

a glass sealed tube with three liquids of different viscosity's. In a red leather covered wood cylinder

Metal Morse code taper with plastic base and finger knob. Engraving moulded into underside, possibly ex forces?

straight walled glass vessel, silvered half way up the glass and wound with five turns of wire as an electrical contact. A brass rod terminated in solid copper wire filaments is suspended from a three armed cap. Silver filings and debris are in the…

outer tube terminates in a large cylindrical bulb and U bend, the upper part has an outlet junction. The inner tube is held in place by a cork. With ABDNP200372a these items are in a cardboard box marked Thermostats

Red painted wooden cylinder, part of whriling body demonstration using whirling stand (that we don't have). Small metal hook at top with attached string

glass insulator with wooden handle with brass tapped ferrule; possibly for handling electrically charged objects