ABSTRACT
Among the readers of Arthur Treveylan’s 1833 paper on the production of musical sounds from heated metals, few were of greater scientific repute than Michael Faraday. The peculiar effects exhibited in these experiments depend upon the occur-rence of isochronous vibrations performed by the rocker. When the heated rocker is reposing upon a horizontal ridge of lead, it touches at two points, which are heated and expanded, and form, as it were, two hills; when one side of the rocker is raised, the point relieved from its contact is instantly cooled by the neighbouring portions of lead, the expansion ceases, and the hill falls. Experiments with other metals were then made. The superiority of lead, as the cold metal, was referred to its great expansive force by heat, Mr. Faraday stated that Mr. Trevelyan had very liberally allowed him the use of a written copy.
