Jean Andre Deluc Facts

Jean Andre Deluc Facts
Jean-André Deluc (February 8, 1727 to November 7, 1817) was a Swiss geologist, meteorologist, and physicist. He invented precise scientific instruments was is best known for his work on theoretical meteorology. He was also an avid collector of plant and mineral specimens.
Interesting Jean Andre Deluc Facts:
Jean Andre Deluc was born in Geneva, Switzerland to a family who had immigrated from Lucca, Italy.
His education was in mathematics and natural science but he was a businessman in his adult years.
He also worked in politics and in 1768 was sent to the Duc de Choiseul in Paris.
His mission was successful and in 1770 he became a member of the Council of Two Hundred in Geneva.
In 1773 he suffered some business losses, gave up business and moved to England.
While in England he became a Fellow of the Royal Society and for the next forty-four years was a reader to Queen Charlotte which allowed him time for scientific study.
He studied the effects of heat and pressure on the mercury barometer and was the first to publish the correct rules for using the barometer to find the height of mountains.
He discovered that water is at its densest at 39 degrees and theorized that the quantity of water vapor in a given space is independent of the density of the air around it.
He devoted much time and study to the invention of scientific instruments and invented a portable barometer for use on expeditions.
He invented a new hygrometer which used mercury.
In 1809 he sent a paper to the Royal Society detailing his improvements to the dry pile, which is a forerunner to the modern dry cell.
He died in Windsor, England at the age of 90.

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