This is a repository copy of A frosty disagreement: John Tyndall, James David Forbes, and the early formation of the X-Club. White Rose Research Online URL for this paper: http://eprints.whiterose.ac.uk/125412/ Version: Accepted Version Article: Kaalund, NKL (2017) A frosty disagreement: John Tyndall, James David Forbes, and the early formation of the X-Club. Annals of Science, 74 (4). pp. 282-298. ISSN 0003-3790 https://doi.org/10.1080/00033790.2017.1379559 © Informa UK Limited, trading as Taylor & Francis Group. This is an Accepted Manuscript of an article published by Taylor & Francis in Annals of Science on 09 Oct 2017, available online: https://doi.org/10.1080/00033790.2017.1379559. Uploaded in accordance with the publisher's self-archiving policy. Reuse Items deposited in White Rose Research Online are protected by copyright, with all rights reserved unless indicated otherwise. They may be downloaded and/or printed for private study, or other acts as permitted by national copyright laws. The publisher or other rights holders may allow further reproduction and re-use of the full text version. This is indicated by the licence information on the White Rose Research Online record for the item. Takedown If you consider content in White Rose Research Online to be in breach of UK law, please notify us by emailing
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[email protected] https://eprints.whiterose.ac.uk/ A frosty disagreement: John Tyndall, James David Forbes, and the early formation of the X-Club Abstract How do glaciers move? This seemingly straightforward question provided the backdrop for a heated debate between the physicists John Tyndall (1820-1893) and James David Forbes (1809-1868) in the late 1850s and early 1860s.