Source: wikibot/hugh-longbourne-callendar
= Hugh Longbourne Callendar
{wiki=Hugh_Longbourne_Callendar}
Hugh Longbourne Callendar (1869–1964) was a British physicist and engineer best known for his contributions to thermodynamics and calorimetry. He is particularly noted for his work on the Callendar effect, which concerns the temperature-dependent resistance of materials, and for developing a form of calorimeter that significantly improved the accuracy of measuring heat capacities.