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,
History of anatomy in the 19th century horror of being the subject of dissection. The criminal temptations ultimately led to the 1827–1828 West Port murders in Edinburgh, UK, where likely candidates were killed and sold for cash. The murders led to the passing of the Anatomy Act 1832 which finally provided for an adequate and legitimate supply of corpses. History of anatomy in the 19th century The history of anatomy in the 19th century saw anatomists largely finalise and systematise the descriptive human anatomy of the previous century. The discipline also progressed to establish growing sources of knowledge in histology and developmental biology, not only of humans