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Joseph Priestley Experiment
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This animation video helps to find out about the
role of air in the process of photosynthesis.
Joseph Priestley in 1770 performed a series of experiments
that revealed the essential role of air on the growth
of green plants.
Priestley observed that a candle burning in a closed
bell jar, soon gets extinguished.
Similarly, a mouse would soon suffocate in a closed space of the bell
jar.
He concluded that a burning candle or an animal,
both somehow, damage air. When he placed a mint
plant in the same bell jar, he found that the mouse
stayed alive and the candle when lighted from
outside continued burning in the presence of the
mint plant.
Priestley’s experiment confirmed that gaseous exchange was going on
and plants were giving out a gas that supported burning and was essential
for the survival of animals.
role of air in the process of photosynthesis.
Joseph Priestley in 1770 performed a series of experiments
that revealed the essential role of air on the growth
of green plants.
Priestley observed that a candle burning in a closed
bell jar, soon gets extinguished.
Similarly, a mouse would soon suffocate in a closed space of the bell
jar.
He concluded that a burning candle or an animal,
both somehow, damage air. When he placed a mint
plant in the same bell jar, he found that the mouse
stayed alive and the candle when lighted from
outside continued burning in the presence of the
mint plant.
Priestley’s experiment confirmed that gaseous exchange was going on
and plants were giving out a gas that supported burning and was essential
for the survival of animals.
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