Browse Items (3436 total)

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

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

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

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

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

glass dome with brass neck piece and large brass knob

a glass apparatus dome cover with green velvet covered rim

one of a pair, circular base weighted with lead, the vertical tapers upward from a bulbous bottom, terminating with a wing nut for holding a telescopic inner section of glass rod

glass specific gravity hydrometer, red lead weighted, scale 1200 to 1300. In cardboard tube