19th century in science Carnot captured some of the ideas of thermodynamics in his discussion of the efficiency of an idealized engine. Sadi Carnot's work provided a basis for the formulation of the first law of thermodynamics—a restatement of the law of conservation of energy—which was stated around 1850 by William Thomson, later known as Lord Kelvin, and Rudolf Clausius. Lord Kelvin, who had extended the concept of absolute zero from gases to all substances in 1848, drew upon the engineering theory of Lazare Carnot, Sadi Carnot, and Émile Clapeyron–as well as the experimentation of James Prescott Joule on the interchangeability of mechanical, chemical,
19th century in literature Gustav Freytag, Gottfried Keller, Wilhelm Raabe, Adalbert Stifter, and Theodor Storm. Later "realist" writers included Benito Pérez Galdós, Guy de Maupassant, Anton Chekhov, José Maria de Eça de Queiroz, Machado de Assis, Bolesław Prus and, in a sense, Émile Zola, whose naturalism is often regarded as an offshoot of realism. 1800s - 1810s - 1820s - 1830s - 1840s - 1850s - 1860s - 1870s - 1880s - 1890s - 1900s - 19th century in literature Literature of the 19th century refers to world literature produced during the 19th century. The range of years is, for the purpose of this