how did he discover the gas?
By the isolation of the particle.
Isolation of nitrogen
Rutherford discovered nitrogen by the isolation of the particle in 1772. 
the general surface wind circulation associated with the high-pressure center (h) is most likely A high-pressure area, high ,or anticyclone. how is it formed? Winds within high-pressure areas flow outward from the higher pressure areas near their centers towards the lower pressure areas further from their centers. Gravity adds to the forces. The winds are further twisted due to Coriolis effect. could i know more about the effect mentioned above? This is an apparent, but fictitious, force that arises when an observer is in a rotating reference frame, due to the conservation of angular momentum of the air as it moves towards or away from the Earth's axis of rotation. how is it related to the wind conditions? They are associated with light winds at the surface and subsidence through the lower portion of the troposphere. what is the last term used above? It is the lowest layer of earth's atmosphere. what does it consist of? Nitrogrn, oxygen, argon, carbon dioxide and small amounts of other gases. who discovered the former from the list above? Daniel Rutherford. what are its properties? It has seven electrons and one of the highest electronegativities among the elements. what are its uses? Synthetically produced nitrogenous compounds like ammonia and nitrates are key industrial fertilisers, and fertiliser nitrates are key pollutants in the eutrophication of water systems. regarding, the water systems process mentioned by you, is it a natural process? It is mostly caused by phosphate and nitrogen from various human sources. where is the scientist mentioned above from? Scotland.
He discovered nitrogen by the isolation of the particle in 1772. When Joseph Black was studying the properties of carbon dioxide, he found that a candle would not burn in it. By the isolation of the particle. He discovered nitrogen by the isolation of the particle, when  Joseph Black was studying the properties of carbon dioxide, he found that a candle would not burn in it. Black turned this problem over to his student at the time
Daniel Rutherford Daniel Rutherford Daniel Rutherford
Isolation of nitrogen Isolation of nitrogen Isolation of nitrogen
Rutherford discovered nitrogen by the isolation of the particle in 1772. When Joseph Black was studying the properties of carbon dioxide, he found that a candle would not burn in it. Black turned this problem over to his student at the time, Rutherford. Rutherford kept a mouse in a space with a confined quantity of air until it died. Then, he burned a candle in the remaining air until it went out. Afterwards, he burned phosphorus in that, until it would not burn. Then the air was passed through a carbon dioxide absorbing solution. The remaining component of the air did not support combustion, and a mouse could not live in it. Rutherford discovered nitrogen by the isolation of the particle in 1772 Rutherford discovered nitrogen by the isolation of the particle in 1772. When Joseph Black was studying the properties of carbon dioxide, he found that a candle would not burn in it. Black turned this problem over to his student at the time, Rutherford.
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Daniel Rutherford [SEP] Isolation of nitrogen
Rutherford discovered nitrogen by the isolation of the particle in 1772. When Joseph Black was studying the properties of carbon dioxide, he found that a candle would not burn in it. Black turned this problem over to his student at the time, Rutherford. Rutherford kept a mouse in a space with a confined quantity of air until it died. Then, he burned a candle in the remaining air until it went out. Afterwards, he burned phosphorus in that, until it would not burn. Then the air was passed through a carbon dioxide absorbing solution. The remaining component of the air did not support combustion, and a mouse could not live in it.