Glass jar with wooden lid; lid handle extends through to bottom of lid with chain attached which hangs into jar. Jar is painted in conducting material.
Provides approx. 1200 Volts at a few hundred Amps . One of the largest vacuum tubes. Pool of mercury in the base acts as a cathode, feeding the 3 side-arm anodes, one for each phase of a 3-phase supply. Three intermediate grids provide some control…
Flat magnetic strip on tripod stand through which an axial current can be passed. Rotation takes place because of the force between the current and the permanent field of the magnet. The first primitive electromagnetic motor ( Faraday ) but a…
2 string (wire) sonometer with screw tension. Dovetailed box with 4 sets of ornate slots between bridges. Later addition of small brass pulley on one end and brass hook on other to take wire with weights. Probably purchased by Prof Thomson.
The curved vanes have been calculated to give straight-line tuning across the dial. Behind the dial, a travelling pointer illuminated by two small bulbs can be swept around to tune in to the stations. 2 (?) gangs of closely spaced vanes. Hand…
