Julius von Mayer
German physicist (1814-1878) · Germany · Scientists · Died at 63
Julius von Mayer is read about 70 times a day, in 46 languages.
A typical day, 30 days to 16 September 2026
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Something wrong?He pinned down the law that energy never vanishes or appears from nothing - then watched another man get the credit.
A life in dates
Also in Deutsch
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In their own words 4
, My early feeling that scientific truths are to the Christian religion much what brooks and rivers are to the ocean, has become my most vital conviction.
Nature has put itself the problem of how to catch in flight light streaming to the Earth and to store the most elusive of all powers in rigid form.
With heartfelt conviction I say it: A sound philosophy must and can be nothing else than a propaedeutic to Christianity.
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Julius Robert von Mayer was a German physician who crossed into physics and chemistry, and in 1841 he wrote one of the first clear statements of what became the first law of thermodynamics: energy can be neither created nor destroyed. A year later he described oxidation as the engine of life and suggested that plants turn light into chemical energy. But his work went unnoticed. In 1843, James Joule published his own calculation of the mechanical equivalent of heat, and history handed him the priority Mayer had earned first. Mayer lived another three decades, the founder whose founding went unrecorded until long after the fact.
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