Browse Items (3473 total)

engraved number 22751. Simple microscope in case with 2 objectives, 4 mm and 14 mm focal length.

User's manual for ABDNP201456a including operating instructions, circuit diagram and supplementary booklets for keyboard and mouse. In original cardboard case.

Lined box containing slits and pinholes for optical bench work.

A wooden box with ventilation holes cut out in a pattern. A metal cover is on one end with 5 screw type terminals numbered "+", 1.5, 15, 150, 600 engraved into metal. A metal plate on the side is inscription. Also engraved underneath the terminals…

Varnished wooden box with 8 knobs and 3 brass terminals, "P.S.B.T. Units" on side, No.2802. "Right at 15.5C". Central zero, plugs giving 1,10,100, 1000 ohms each side. Plug insulated handles showing white spots.

Black ebonite top containing 2 brass terminal and brass key. Paper label ' 0.0050 microF 0.0048 microF '

Double track resistance box with varnished wooden box, 12plugs introducing 1, 2, 3, 4, 10, 20, 30, 40, 100, 200, 300, 400 ohms. Side PS BT Units, no. 2590 "Right at 15.5 C".

a brass circular base with an upright rod fixed in its centre

Voltmeter in mahogany box with brass handle and brass-rimmed glass window with scale; scale ranging from 0.5-0.5; 2 terminals; one on either side of the boxmakers mark - Electrical Tower Storage Company; No 903; stamped UASD on back (University of…

Fanny Tacchinardi Persiani was an Italian soprano opera singer in