Explain the experiment of Jan Ingenhousz.

(N/A) $\Rightarrow$ Jan Ingenhousz $(1730-1799)$ used a setup similar to the one used by Priestley.
$\Rightarrow$ He performed the experiment once in the dark and once in sunlight.
$\Rightarrow$ It was concluded that sunlight is essential to the plant process.
$\Rightarrow$ Sunlight somehow purifies the air fouled by burning candles or breathing animals.
$\Rightarrow$ In an elegant experiment with an aquatic plant,Ingenhousz showed that in bright sunlight,small bubbles were formed around the green parts.
$\Rightarrow$ While in the dark,these bubbles did not occur.
$\Rightarrow$ Later,he identified these bubbles to be of oxygen.
$\Rightarrow$ Hence,he demonstrated that only the green parts of the plants can release oxygen.