what does this theory say in short?
After Bergman informed the pharmacist about his findings, the pharmacist explained that saltpeter  had absorbed phlogiston with the heat and gave off a new phlogisticated gas as an active principle when combined with an acid.
Carl Wilhelm Scheele
the saltpeter had absorbed phlogiston with the heat (had been reduced to nitrite, in modern terms) and gave off a new phlogisticated gas as an active principle when combined with an acid 
what is tropical storm arlene (1981)? It was a rare off-season tropical cyclone. what is the physical structure of this above type of cyclone just mentioned? Its formation was unusual, originating from a tropical disturbance that crossed from the eastern Pacific Ocean into the Caribbean Sea; few Atlantic hurricanes develop in this manner. what is the seasonal variation seen in this last mentioned hurricane? Approximately 97 percent of tropical cyclones that form in the North Atlantic develop between the dates of June 1 and November 30 and the official end has shifted from its initial date of October 31. what kind of intensity it has? It is determined by either the storm's maximum sustained winds or lowest barometric pressure. what are the steering factors of this hurricane? The surrounding flow throughout the depth of the troposphere, the atmospheric flow affects the path of a hurricane across the ocean etc what is the composition of the above mentioned sphere? Nitrogen, oxygen, argon, carbon dioxide etc what are some early experiments regarding the second mentioned gas? Relationship between combustion and air, air is necessary for combustion, fire requires only a part of air etc how did its discovery take place? Swedish pharmacist Carl Wilhelm Scheele produced oxygen gas by heating mercuric oxide and various nitrates in 1771–2. what theory did this above mentioned pharmacist invent? Theory of phlogiston
wiki:5348158
Carl Wilhelm Scheele [SEP] The theory of phlogiston
Bergman informed Scheele that the saltpeter he had purchased from Scheele's employer, after long heating, produced red vapors (now known to be nitrogen dioxide) when it came into contact with acetic acid. Scheele's quick explanation was that the saltpeter had absorbed phlogiston with the heat (had been reduced to nitrite, in modern terms) and gave off a new phlogisticated gas as an active principle when combined with an acid (even a weak acid). Bergman next suggested that Scheele analyze the properties of manganese (IV) oxide. It was through his studies of manganese (IV) oxide that Scheele developed his concept of "fire air" (his name for oxygen).