Émilie's debut as a writer was 1736 with the prologue she made to Bernard Mandeville’s The Fable of the Bees, which she herself translated.

He 1737, va publicar l'obra Dissertation on the nature and propagation of fire, based on his research of fire, predicted that what today is known as infrared radiation and the nature of light.

Her book Institutions de Physique released 1740 and was presented as a review of the new scientific and philosophical ideas his son had to study, but it incorporated and attempted to reconcile complex ideas of the leading thinkers of the time. In this work, combined the theories of Gottfried Leibniz and the practical observations of Willem Jacob’s Gravesande to show that the energy of a moving object is proportional to its mass and the square of its velocity. (E ~ mv2), and not directly proportional as Isaac Newton thought, Voltaire and others.

When Albert Einstein revealed his famous equation of the energy of matter E = mc2 (where c represents the speed of light), it corresponded perfectly with the principle recognized by Émilie du Châtelet 150 years ago. With the publication of this work he was appointed a member of the Bologna Academy of Sciences..

Years later he wrote the Discourse on Happiness, autobiographical work that was not published until the year 1779, where women spoke again, among other things.

In the year of his death he completed the work recognized as his most important milestone in which he had begun to work the 1736: translation into French, Own a comment, Mathematical Principles of the NEWTON, extracting from the principles of mechanics postulated by Newton a notion of conservation of energy. The edition was accompanied by an extensive introduction that made it more understandable and mathematical appendices where he solved the differential equations proposed by Newton., after reviewing them with mathematician Alexis Claude Clairaut. This translation is still the standard translation of the work into French.

Du Châtelet and Voltaire had met each other as children in one of their father's salons, Voltaire himself recalled his meeting dates 1729, when he returned from exile in London. However, their friendship really began in May 1733, in their reintegration into society after the birth of her third child.

Du Châtelet was invited to a live house in Cirey-sur-Blaise, in Haute-Marne, northeast France, and became her companion long. There he studied physics and mathematics and published scientific articles and translations.

In May 1748, Du Châtelet began an affair with the poet Jean François de Saint-Lambert and became pregnant. In a letter to a friend, he confided his fears that she would not survive the pregnancy. On the night 3 September 1749, gave birth to a daughter, Stanislaus Adelaide, but Du Châtelet died a week after a pulmonary embolism at the age of 42 years. His daughter died about eighteen months later.

FOR MORE INFORMATION