Two syntonic Leyden jars, unknown maker, Germany, 1880-1889. Possibly the actual ones used by Oliver Lodge in March 1889 at the Royal Institution to demonstrate resonance in adjacent circuits when at the same frequency.
At a lecture at the Royal Institution in March 1889, Oliver Lodge used two Leyden jars to demonstrate resonance, or vibration, in adjacent circuits when at the same frequency. A Leyden jar is a device that 'stores' static electricity between two electrodes on the inside and outside of the jar, which is an insulator or 'dielectric'. Lodge demonstrated that when a Leyden jar was discharged near a similar jar, sparks occurred across a small air gap when the circuits resonated at the same frequency. If the slider adjustment on the second jar was moved to a different position it failed to resonate. Lodge patented the idea in 1897 and it became the fundamental patent for tuning.
- Radio Communication
overall (all parts): 300 mm x 150 mm, 4.9 kg
- leyden jar
- Donated by E. E. and T. H. Robinson
Cite this page
We encourage the use and reuse of our collection data.
Data in the title, made, maker and details fields are released under Creative Commons Zero
Descriptions and all other text content are licensed under a Creative Commons Attribution 4.0 licence
Download catalogue entry as json
View manifest in IIIF viewer
Download manifest IIIF
Our records are constantly being enhanced and improved, but please note that we cannot guarantee the accuracy of any information shown on this website.