Browse Items (3473 total)

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

glass hydrometer, scale1400-1600, lead weighted bottom bulb. In red cardboard box

Metal lock shaped item with hole in centre and spring

glass specific gravity hydrometer, lead shot weighted, scale 900 to 950. Separate weight and float bulbs. In cardboard tube

Used carbon filament lamp (16 cp?) with standard bayonet cap. Marked "BTH Edison". Conspicuous darkening of inside of bulb

four rods for stroking with fur to produce electrostatic charge. Materials differ and are probably not amber (Gr electrum). Wrapped in grey woven material

Brass stand with adjustable section

Mainframe computer lineprinter character band in cartridge holder for manual insertion. Honeywell part 47214417. Stored supported on its own support pads

Small lens held in brass frame on metal pole above a set of cross hairs.