You're funny Sparky!
The phlogistion theory is of course now completely discredited, mostly due to the work of Antoine Lavosier, the father of modern chemistry, in the late 1700s.
It's a very interesting example of how science works. Even as more and more evidence was gathered to disprove the phlogiston theory, many people stubbornly continued to hang on to it rather than admit they had a wrong belief (sound familiar?).
Here is a brief excerpt from a WP article on the subject:
Phlogiston Theory - Challenge and demise: Phlogiston remained the dominant theory until the 1780s when Antoine-Laurent Lavoisier showed that combustion requires a gas that has mass (oxygen) and could be measured by means of weighing closed vessels. ...
Experienced chemists who supported Stahl's phlogiston theory attempted to respond to the challenges suggested by Lavoisier and the newer chemists. In doing so, phlogiston theory became more complicated and assumed too much, contributing to the overall demise of the theory. Many people tried to remodel their theories on phlogiston in order to have the theory work with what Lavoisier was doing in his experiments. Pierre Macquer reworded his theory many times, and even though he is said to have thought the theory of phlogiston was doomed, he stood by phlogiston and tried to make the theory work. [Emphasis added]