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,
Christianity in the 19th century and cultural influences of the Enlightenment began to be felt in the Protestant churches, especially in the 19th century, Liberal Christianity, exemplified especially by numerous theologians in Germany in the 19th century, sought to bring the churches alongside of the broad revolution that modernism represented. In doing so, new critical approaches to the Bible were developed, new attitudes became evident about the role of religion in society, and a new openness to questioning the nearly universally accepted definitions of Christian orthodoxy began to become obvious. In reaction to these developments, Christian fundamentalism was a movement to reject the radical influences