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Jean Augustin Barral

Jean Augustin Barral

C018/0921

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Credit

SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY

Caption

Jean Augustin Barral (1819-1884), French agricultural chemist, meteorologist, physicist and professor. He was the first to extract nicotine from tobacco leaf. In 1850, with Jacques Alexandre Bixio, he made two aerostatic scientific expeditions in a hydrogen-filled balloon to observe variations in the temperature, atmospheric pressure and humidity in the atmosphere at different altitudes. The severe weather conditions on the second flight made observations difficult but they attained a height of 7016 meters, though the temperature fell to 39 degrees F. below zero.

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