Glass tube with brass ends; with ball terminals; inside tube is spiral of small metal discs each seperated by gap of less than 1 mm; when tube is placed across an electrostatic generator, a spiral discharge is seen around inside of tube caused by…
1 large adjustable spark gap with 1/2 mm separation scale from 0 to 100 mm. Balls plated brass; silver coloured. For detecting spark transmissions following Hertz's method.
two nickel (?) balls mounted on insulating rods affixed to a wooden base. Connection is made to the balls by plug in brass connectors, the connecting wires have been cut off. Mounted on a rectangular wooden base with four rubber feet, one ball can…
The Conservative and Unionist Party were completely against the Liberal concept of Home Rule (devloution). This booklet commemorates a fete held at Fyvie Castle by the women's branch of the organization.