 Working in Helmholtz’s refurbished Berlin laboratory, Weber measured the specific heats of these three elements and showed them to be noticeably smaller at low temperatures than predicted by the Dulong–Petit law; moreover, he found that, with an increase in temperature, their specific heats increased extraordinarily rapidly.Only when he increased the temperature beyond 1,000 degrees Celsius did the specific heats again follow the predictions of Dulong and Petit.For nearly thirty years Weber’s empirical findings remained an anomaly until one of his students presented a new explanation (Weiss 1912, pp.