2007-03-15 05:15:55 · 3 answers · asked by Anonymous in Science & Mathematics ➔ Botany
Julius Sachs in 1864
2007-03-15 05:29:55 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Joseph Priestly, a chemist and minister, discovered that when he isolated a volume of air under an inverted jar, and burned a candle in it, the candle would burn out very quickly, much before it ran out of wax. He further discovered that a mouse could similarly "injure" air. He then showed that the air that had been "injured" by the candle and the mouse could be restored by a plant. In 1778, Jan Ingenhousz, court physician to the Austrian Empress, repeated Priestly's experiments. He discovered that it was the influence of sun and light on the plant that could cause it to rescue a mouse in a matter of hours.
In 1796, Jean Senebier, a French pastor, showed that CO2 was the "fixed" or "injured" air and that it was taken up by plants in photosynthesis. Soon afterwards, Theodore de Saussure showed that the increase in mass of the plant as it grows could not be due only to uptake of CO2, but also to the incorporation of water.
2007-03-15 12:24:55 · answer #2 · answered by maverick_youth 4 · 0⤊ 0⤋
joseph priestly
2007-03-15 12:25:54 · answer #3 · answered by lilawiwa 2 · 0⤊ 0⤋