Trevelyan's rocker

Sound can be produced by a multitude of things. In 1829 Arthur Trevelyan demonstrated with a similar model to the English Royal Society, that also metals that are cooling down can produce a clear tone. A wedge-shaped piece of metal (copper, brass, iron or zinc) is attached to a long brass bar of which the other end can be clamped on a wooden baseboard. The bar is attached in such a way that the piece of metal is barely supported by a lead block . When this is done after heating of the metal end, the lead will expand and give to the bar a little push upwards. Gravity makes the bar fall back upon the lead, after which the process is repeated. The vibration created in this way produces an audible tone.

Administration name

Fysisch Kabinet


Trevelyan's rocker

Translated title

Trevelyan's rocker

Production notes

1859 pre


[{'material': 'Mahogany'}, {'material': 'ivory'}, {'material': 'lead'}, {'material': 'Copper'}, {'material': 'brass'}]

Object number

FK 0241

Reproduction reference

[{'reference': '..\\images\\Fysisch\\Gekoppelde afbeeldingen\\FK 0241.jpg'}]