August 19.1727-Hales observed the coal heating will produce flammable gas in a sealed container "
In July (DingWei third), August 19, 1727, Hales observed coal is heated in a sealed container will produce flammable gases. 
1727 8, 19, British pastor, botanist, physiologist Hales observed coal is heated in a sealed container will produce flammable gases "" target = "_blank"> Hales pointed forward to "plant statics: coal is heated in a sealed container will produce flammable gases In fact, Clayton discovered around 1684 this phenomenon. merely to 1739 before a public found. Clayton heating the coal observed "the soul of the coal can be candle lit coal into a gas, and then be used as an energy source, is a significant advance in the way of human coal, and it gave rise great convenience.
, found gas
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