Licence: Public Domain Mark
Credit: Sound / by John Tyndall. Source: Wellcome Collection.
Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)
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Licence: Public Domain Mark
Credit: Sound / by John Tyndall. Source: Wellcome Collection.
Provider: This material has been provided by UCL Library Services. The original may be consulted at UCL (University College London)
